yacht solar panels

Yachting Monthly

• Digital edition

Sailing with solar power: A practical guide

• Duncan Kent
• November 13, 2020

The latest solar technology makes self-sufficient cruising much more achievable. Duncan Kent gives the lowdown on everything you need to get your boat sorted

SOLAR POWER ON BOARD

Solar power is fast becoming the most popular and economic method of keeping the batteries charged on a boat.

Particularly now that the efficiency of photovoltaic (PV) panels, charge controllers and batteries is improving every day.

Furthermore, the latest technology in regulators and charge controllers has brought about a noticeable increase in useable power output, so the problems of shading and non-alignment can be compensated for more easily.

Not only has PV equipment become more efficient and cost-effective, but many of the modern devices we want to use on a boat have become less power hungry.

This means it is now far easier to provide your entire yacht’s electrical needs, both 220Vac and 12/24Vdc, from natural energy resources – particularly solar power, even if you are planning on a fully electric boat .

Thinking carefully about how much power you need and how much your boat can accommodate is key to planning a solar array. Credit: Graham Snook

WHAT DO YOU NEED?

For instance, a boat with two new, good quality, deep-cycle house batteries of 100Ah each would supply 100Ah of energy to consume between charges, if you only use the recommended 50% of available charge between each charge cycle to protect the batteries.

From this you could run:

• a modern 12Vdc fridge (approx. 1.5Ah, or 36Ah over 24hrs),
• all LED lighting (say 20Ah per day),
• various small device chargers (20Ah)
• and a number of other items such as water pumps, TVs and stereos (25Ah/day)
• Totalling around 100Ah.
• For this you’d need 400W of solar capacity.

Of course, if you like to run a lot of AC devices off-grid such as hair dryers, microwaves, toasters and the like, then you’re going to need a DC/ AC inverter, which will take you to another level in power consumption terms.

But even then, with careful planning, solar could provide a large portion of the power you need before resorting to engine charging or a generator.

THE AVAILABLE SPACE

In practical terms, a modern 40ft monohull would have the space for around 1,200W of PV panels (cockpit arch, sprayhood top, deck), maybe 1,500W with the addition of a few portable panels for use at anchor.

The 1,200W of fixed position solar array could produce around 360Ah on a sunny summer’s day (zero shading) or more likely 250Ah on the average UK summer’s day.

So that’s enough for your 100Ah general DC consumption plus another 150Ah of AC consumption via the inverter.

Of course, to do this you’ll most likely need to increase your battery capacity to around 400-500Ah for maximum flexibility (you’ll need to store as much as possible during daylight hours), a typical figure for a 40-50ft offshore cruising yacht these days.

Get your solar charging right and you may never need to hook up to shore power

Typical daily inverter loads for a cruising yacht off grid might be:

• induction cooking plate (20min) 60Ah
• microwave (15min) 30Ah
• coffee maker (20mins) 25Ah
• hair dryer (5min) 15Ah
• laptop charger (2h) 10Ah
• or around 140Ah in total.

The trick is to monitor the batteries’ state of charge (SOC) at all times and vary your use of the inverter to suit.

For example, you might want to cook supper mid-afternoon, when solar is in abundance, and then reheat it in the evening when you want to eat it.

In some cases, when you’re cruising in warm climates such as the Med, you might end up with excess charge from your solar panels .

In this situation, many long-term cruisers devise a method of ‘dumping’ the extra energy by heating water for showers.

Do bear in mind if you’re planning to live aboard full time , then it’ll be a whole different story on cloudy days and during the winter, when inverter use might need to be knocked on the head entirely.

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POWER DISCREPANCIES

There’s often confusion as to how much power you can harvest from a solar installation.

A PV panel is nearly always advertised stating its theoretical peak output power (Pw).

But in reality, on a yacht where there are limited areas in which to mount them, they will more likely produce a maximum of 60% of their peak output if mounted horizontally, increasing to 80% if tilted towards the sun and regularly adjusted.

The latter is rarely achievable on a boat, however, as even at anchor it can swing through an arc of 180° in wind or tidal shifts .

Flexible panels can be mounted on sprayhoods or awnings to add power when it’s needed at anchor or in harbour

INSTALLATION

Having trawled through hundreds of ‘deals’ to get the best price on the most efficient panels you can afford you now need to know how to install them to best fulfill your energy generation needs.

The output, even from the highest quality photo-voltaic array, will only be as good as the installation itself.

So following our guidelines should ensure you extract every last drop of energy from your investment.

PANEL MOUNTING

Sailing boats are not the ideal structure on which to mount wide, flat PV panels.

So before you go ahead and purchase what looks like the biggest and best, take a few minutes to decide on exactly where you can mount them, as this will affect what size and type of panels you should buy.

In many cases the first choice would be on an arch, davits or gantry aft, especially if you already have, or plan to fit one.

Dinghy davits, particularly on multihulls, can support a huge solar capacity

These allow a solid metal framework to be constructed that will be strong enough to take the heavier, more productive rigid PV panels.

You can also build in some form of adjuster to the framework that will allow the panels to be orientated towards the sun for the best performance.

With luck (or careful planning) a gantry will also keep them aft of the boom, thereby eliminating loss of output caused by boom shading.

The next most popular position for mounting the panels is on a cockpit sprayhood or bimini, although this will often mean using the flexible or semi-flexible panels, which are generally less efficient than the rigid ones for the same area.

ELEVATED MOUNTING

Alternatively, there are kits available for mounting panels onto lifelines, which can allow their elevation to be manually adjusted to a certain degree.

Pole-mounted panels can be used for maximum adjustability

Finally, panels can be fitted directly onto the deck by either gluing them down using mastic or attaching them onto a rigid support frame.

Once again you will probably need to use semi-flexible panels – especially if the deck surface is curved.

Rigid, glass-coated panels will obviously not be suitable for deck mounting in an area that is frequently walked over.

Don’t be tempted to drill through the panels, even along the edges, as this will invalidate the warranty and possibly damage the panel.

With solid panels, the ability to adjust the angle can add significantly to output

It might seem obvious, but the key to an efficient system is to avoid shading wherever possible.

It’s no good fitting expensive, high-efficiency PVs right under the boom as they’ll perform little better than the cheaper types.

Saying that, in good quality panels each cell will be isolated from the next by a series of diodes (one-way electrical valves), so that if one cell is shaded at least it won’t drag down the other cells within the same panel.

Older panels often didn’t have these, so the slightest partial shading caused the output of the entire panel to cease.

OVERHEATING

Another important factor that is often ignored when installing the panels is that of overheating.

If a PV panel gets too hot, which is quite likely if mounted directly onto a flat surface without an air gap behind, its output will drop quite noticeably.

To allow for some air circulation behind the panels it’s best to apply mastic adhesive in numerous large dabs.

This is best achieved by placing wooden spacer strips between the dabs until the mastic has completely cured, after which the spacers can be removed.

You might need some form of trim around one or more of the outside edges, though, if they are positioned where sheets and other lines might get caught under them.

Raising the panels up will also help water to drain off and thereby helping to avoid possible delamination from sitting in water for too long.

CHARGE CONTROL

A PV module cannot supply an electrical device directly due to the changeability of the sunlight, which in turns varies the current it can produce.

Therefore, it has to be connected to a battery, which stores and smooths its output.

Whatever the size of your solar array you will need to fit a regulator, or charge controller as they are now more commonly known, to the system in order to control the output and to help extract as much power from the panels as possible.

There are two types of PV charge controller.

The older designs, called Pulse Width Modulation (PWM) types, were fairly basic voltage regulators and simply output volts at just above battery level.

The latest controllers use Multi Power Point Tracking (MPPT) technology and can accept much higher input voltages (up to 240Vdc).

MPPT controllers can be up to 30% more efficient as they use the peak output of the panels to charge the batteries, even compensating for partial shading.

BEWARE FAKE GEAR

If you buy online do be careful to ensure you’re getting what you pay for.

There are a huge number of fake MPPTs out there, which are simply the much cheaper PWM dressed up with fake labels.

It’s hard to tell which is which, but the old adage of ‘if it looks too good to be true, it usually is’ makes good sense.

MPPT controllers are usually bigger and heavier than PWMs, but if in doubt call or email the supplier to discuss the pros and cons of their kit before buying.

If they’re not happy to chat and advise you then I would steer clear of their gear.

Some good MPPTs are made in China, but unless they have a UK supplier, I wouldn’t bother with them as you’ll have no follow-up advice.

To calculate what size controller you need simply divide the panel’s peak power in Watts (Wp) by the battery voltage, which will give you the maximum current (Amps) they could theoretically supply.

For example 240W/12V = 20A. Although it’s unlikely you’ll ever get near the peak output from any PV panel, it’s best to go for the maximum possible.

Induction cooking is now a reality on board, even without shore power

PV panels come with a short length of cable, usually around 1m long.

Some are supplied with MC4 connectors already attached but most only provide bare wires.

The latter can be easily extended using proper waterproof connections but thought must be given as to the current rating and voltage drop (usually max 3%) for the size of cable you intend to use.

If in doubt, bigger is better!

Panels can sometimes be ordered with the wiring on the back so that the cable can go straight below deck through a hole under the panel.

You may need to fit extra battery capacity if you want to run an inverter from solar charging

SERIES OR PARALLEL?

A commonly asked question is ‘should I wire my PV panels in series or in parallel?’

The simple answer is, if there’s any danger of frequent shading to one or more of the panels then install them in parallel.

If wired in series the shading of a single panel will drag down the output from all of the others in the same series.

PARALLEL IS PREFERRED

Most commonly, multiple panels are wired together in parallel to a single charge controller, with diodes protecting each panel from discharging the others should one become partially shaded.

With the advent of MPPT controllers, however, there can sometimes be a benefit to wiring two or more identical panels into a series bank, thereby presenting a higher voltage to the controller.

It’s worth noting that, like batteries, wiring PV panels in series increases the voltage only – the current capacity of the array remains the same as for a single panel.

‘Where’s the benefit of wiring them in series then?’ you might ask.

Well, the higher the voltage fed into the MPPT, the more consistent it will be with its output, which could, in some cases, prove more efficient than a parallel installation with PWM controllers.

It’s also likely to be necessary if you have a 24V domestic system.

SERIES WIRING

Series wiring is usually only done when the cable runs are long, as it helps negate the voltage drop caused by the resistance of the cable.

While a decent controller will have no problem handling the output from four or even five panels wired in series, it is often inappropriate for sailing yachts as shading just one of the panels will reduce the output of the entire series array.

If you need to do so in order to reduce cable runs then it’s best to split the panels between each side of the boat – a series bank on each side.

If you do this, then you would ideally fit a separate controller to each series PV bank and then connect their outputs together in parallel to the battery bank.

Note, however, that panels wired in series must all be the same types with an equal number of cells per panel.

Furthermore, the charge controller needs to be sized for the total of all panel voltages added together and the current rating of one individual panel.

Differently rated panels can be connected together in parallel but only if each panel has its own controller.

The outputs of the individual controllers can then be joined together to go to the battery bank.

BATTERY BANK QUESTION

Another frequently asked question is ‘Can I connect another charging source to the battery bank while the solar array is charging?’

The answer is yes.

Any decent PV controller will be protected against feedback from other charging sources.

Think carefully about where shade from mast, boom and rigging will fall. Credit: Graham Snook Photography

CABLE SIZE AND CONNECTORS

A frequent cause of reduced output from PV arrays is wiring that is too small.

The resistance of a wire conductor increases in direct proportion to its cross-sectional area, so go as big as is practicable for the least cable loss.

Each panel should be supplied with the correctly sized cables for its own maximum output.

But if you’re combining panels, either in parallel or in series, you will clearly need to rate the single feed cable to suit the maximum current available at theoretical peak solar output and to minimise voltage drop.

Likewise, the cable from the controller to the batteries should be sized to suit the controller’s maximum output current and protected with a fuse.

For outside it’s important to use exterior grade cable, which is double- insulated and UV-proof.

WEATHERPROOF CONNECTORS

And wherever possible use compatible weatherproof connectors (usually MC4) to those found on the panels rather than cutting off the plugs and hard-wiring them.

Field- assembly MC4 plugs are available, so you don’t have to drill large holes in the decks or bulkheads when feeding the cables through.

When joining more than one panel together try to use the approved multiway connectors; not only do they keep the wiring neat and tidy, but they also offer a greater contact area than budget terminal blocks.

If you have to use screw-type connectors make sure to fit proper ferrules to the wire first to avoid any stray wires in the multistrand shorting across the terminals.

When feeding a cable from above to below deck, try to go through an upright bulkhead where possible to minimise ‘pooling’ of water around the access hole.

Also, use a proper watertight deck seal that matches the cable you’re using.

If drilling through a cored deck you need to drill a larger hole first, fill it with epoxy resin and then drill the required size hole through the epoxy to ensure no water gets into the deck core.

Ideally, the charge controller should be mounted no further than 2m from the battery bank.

If you need to go further, you’ll require larger cabling to reduce the voltage drop.

A generous solar array will keep you self- sufficient indefinitely. Credit: Graham Snook Photography

CONTROLLER LOAD TERMINALS

There is often confusion over the ‘load’ output of a charge controller (often depicted by a light bulb) and what can safely be connected to these terminals.

Rarely explained in the manual, the load terminals should be pretty much ignored in a marine installation as the output on these terminals is usually very limited (10A max).

Some attach an LED light to them to indicate the controller is operating, but all your usual electrical loads should remain connected to the batteries with the battery terminals on the controller connected directly to that battery bank via a fuse.

It is possible, though, to control a high-current switching relay in certain conditions.

Parallel installation is more resilient to shading, but a series installation will increase peak charging outputs. A combination of the two offers some of the benefit of both

CIRCUIT MONITORING

Unlike most cheap PWMs, the majority of good quality MPPT charge controllers come with an alphanumeric LCD screen to let you know what is going on.

This can either be a remote display or simply one on the front of the box.

It’s obviously a lot better to have a proper numerical display than to rely on a few flashing LEDs to tell you when something’s not right.

So if your chosen controller doesn’t have one be sure to fit a battery monitor (the shunt type) into your solar circuit between the controller and the batteries.

It doesn’t have to be a very ‘smart’ monitor, just one that can display the voltage and current being supplied by the panels.

For smartphone addicts there are several wifi apps that will do the job remotely on your phone or tablet.

DEVICE PROTECTION

All good quality PV panels feature built-in diode protection between each cell to prevent a shaded cell from dragging down the productive ones.

In addition, there will be internal blocking diodes on the final output to protect the panel from polarity reversal and to ensure that the batteries can’t discharge back into the panel during the night.

The latter can be added externally, the former can’t, so check before you buy.

A fuse, rated just above the maximum current available, should be fitted between each panel and the charge controller.

Another fuse should then be installed between the charge controller’s output and the batteries.

In the case of multiple arrays, this second fuse will be rated higher than the individual panel fuses and should match the maximum current rating of the cable.

With this protection installed other charging devices can be connected in parallel at the battery, meaning the solar can be left connected even when you are hooked up to shore power and the battery charger is operating.

In some circumstances, however, this arrangement can affect the sensing of the battery by the charger, causing it to fall back into float mode.

If this becomes apparent it can be overcome by installing a manual/auto switch to disconnect the solar array when on shore power.

Check the flex of the solar panel is sufficient for your deck

EXCESS POWER DUMPING

A solar charge controller works by disconnecting the supply from the PV panels when the batteries are fully charged.

But for some full-time liveaboards in sunny climates that can be considered a waste, when the excess power could be put to good use – heating water, say.

This is commonly done using an inverter to supply AC power to the heating element.

Alternatively, you can now buy a 12Vdc element for your calorifier (hot water tank) and supply this directly from your battery bank.

Both of these methods would require a voltage sensitive relay (VSR) to disconnect the element should the battery voltage drop below a pre-set level.

Don’t expect boiling hot water, as there will probably only be enough spare power to take the chill off it before your battery bank reaches its lower threshold voltage.

A 600W/12V element will draw some 50A, from the batteries, whereas a 1kW AC element run through an inverter will need close to 100A.

A small, semi-flexible panel will be sufficient for keeping batteries trickle charged, but not for heavy use

RIGID, FLEXIBLE, OR SEMI FLEXIBLE?

Despite massive recent improvements in semi-flexible panels in recent years, the solid glass panels still offer a higher power density.

That said, they are heavier, more awkward to mount and can’t be walked on, so unless you have a dedicated gantry aft, you’re better off choosing the more rugged semi-flexibles.

Modules incorporating monocrystalline cells also have a better output than those with polycrystalline cells (that’s cells made from a single slice of silicon as opposed to layers of smaller pieces).

Output voltage also depends on the number of cells on the panel.

In the past this has commonly been 32, but now some 36 and even 40 cell panels are available.

That said, they’re larger, of course, so an array of interconnected smaller panels might be a better solution.

Module efficiency is now more often around the 20% mark, as opposed to 12-15% for older models and semi- flexible (up to 20° bend) are usually better than flexible (up to 180° bend).

A rigid panel is more efficient, but less robust

There are a huge number of panels on the market, but many use the same cells.

Sunpower Maxeon cells are exceptionally good, as are the Panasonic HIT range and LG, but they are pricey.

If the maker is offering a 25-year guarantee instead of a 3-5 year one, you can be pretty confident they’re good.

When it comes to charge controllers it’s definitely worth paying a little more for a decent MPPT.

A cheap PWM might be okay just to keep a small starter battery charged with a 30W panel, but the MPPT will give you much more when it comes to heavy service.

Victron are probably top of the range, while cheaper brands like MakeSkyBlue and EPever are also good value – but treat imports of unclear origin with care.

ABOUT THE AUTHOR

Duncan Kent has been evaluating and reviewing yachts and marine equipment for the past 30 years

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Federal Tax Credits

Have you heard about the Federal Tax Credits that you could take advantage of for going solar on your boat?  Yes, your boat! 

Do you have a head, galley & bunk aboard? Then you may qualify and t he Federal Tax Credit has now gone back up to 30% of the total cost to put your solar system in place.

This can include solar panels, controllers, wiring, labor etc. and can now more easily include batteries - maybe time for that lithium upgrade to Battle Born

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News & reviews.

Maxeon to open new factory in USA

Great news! Maxeon recently announced (Aug 10th) that they will be opening a 3 Gigawatt factory in New Mexico. Construction will begin Spring 2024 and so by 2025 that's high efficiency Maxeon solar panels being made right here in the USA! 

Read our news post for full details.

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Are you looking for a boat already set up to go cruising?  We have our 2016 Dufour 382 GL 'Blake' listed for sale on Yacht World .  She is the adventure version with taller mast/deeper keel, 950W of SunPower flexible solar panels, a DC watermaker, new dinghy and plenty of safety gear.  Currently hauled out in Freeport, Bahamas.  For more details contact our broker Amanda Haley with South Florida Sailing

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Check out our Install List  

We have added an Install List page to our website which currently has over 130 installs from our customers.  Get inspired by what other boat owners have added for SunPower & Maxeon solar panels. 

Maybe you own a Lagoon 400 or a Morgan 41 and wonder what panels might fit aboard, check out the list to see how other owners have gone solar aboard.

Calico Skies 3x 410W

Bill & Grace sail Calico Skies , a Sabre 36, and whilst in Mexico they installed 3x410W SunPower fixed frame solar panels as part of a major upgrade to their arch/davit system.  

Check out their YouTube episodes including  #177 to see how they get on adding 1,230W (or 1.23kW) of SunPower solar panels.

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Bill & Grace

SV Delos 3x 410W + flex

Brian & Karin of SV Delos   installed 3x410W SunPower fixed frame panels when on the hard in Mexico ( YouTube Ep.407 ) 

Combined with their SunPower E-flex panels, which have been aboard for ~3 years ( YouTube Ep.262 ) they now have just under 2,00W of solar keeping them powered up in the Pacific - awesome! 

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Sailing La Vagabonde 2x 470W + flex

Riley & Elayna of Sailing La Vagabonde have been working on their new Rapido 60' trimaran and added 2x470W Maxeon fixed frame panels. 

They also have 6x170W SunPower flex panels they can deploy when needed.  With a 48V battery bank these panels are wired in series  YouTube episode

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Testimonials

"So now I generally

Don't bother hooking, up to shore power".

     Thanks for all the help in planning my solar project for my boat. The two 170W flexible panels fit well on my Bimini and now I generally don't bother hooking up to shore power.  Although I haven’t had any long trips since my installation I have done a few day trips. And even with fridge, radio, plotters, autopilot and occasional radar it seems that these panels are keeping up with my usage. The advice and service has been great.   Thanks again.

Jeanneau Sun Odyssey 469

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         The process of researching a solar solution for my Beneteau 41 was simplified & clearly understood once I discovered Sun Powered Yachts.  Terrific customer service, patient, always responsive with guidance and products that just work. Being a novice at setting up a solar system, I had many questions along the way, and the team at Sun Powered Yachts were always there to answers my questions and provide support.

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Solar Panels For Boats and Yachts

By Michael Olenick | Jul 26, 2022

The purchase of a boat or a yacht is a coveted purchase for many people. While it certainly adds a new dynamic to one’s life, it’s not the most straightforward investment since maintenance is a huge component of owning a sea vessel. Other than the physical maintenance of your boat, fuel management and maintenance is often a logistical nightmare for many boat owners. Some of these problems include keeping batteries topped off; doing it quietly, as not to bother the surrounding communities; and refueling costs. An easy solution to these problems: solar panels.

Sizing a Solar System for Your Boat or Yacht

• Refrigerator(s)
• Radar & sonar units

When adding up your energy consumption, always round up and add about 10-15% extra Watt-hours to your total, as certain appliances tend to use up more energy during spring and summer months. Once you reach the conclusion that you are ready for a further discussion, you can always reach out to a solar panel expert to get solar quotes, help with your energy calculations, and aid in determining the right number of panels you would need to offset your yacht or boat’s energy usage. Obviously, the number of panels you would need depends on energy usage and vessel size, but solar is a much better option than common fossil fuels when powering your boat.

The Benefits of Adding Solar Panels To a Boat or Yacht

When it comes to adding solar panels to your boat, the benefits are endless. Here are just a few for you to consider:

• Silence: Noisy refueling at docks and extremely loud on-board generators are a thing of the past. Cruise the seas in with zero mechanical noises, and enjoy the natural ocean sounds.
• Minimal Maintenance: The only maintenance solar panels require is a simple rinse off every couple of months, as salt can build up when the seawater evaporates.

• Travel Lightly: With your new panels, you won’t have to lug heavy containers of fuel with you on your trips. More room for wine or martini mix.
• Unlimited Energy: Aside from the occasional cloud in the sky, you will have full access to the sun on the open seas.

Besides the affordability and convenience, solar panels could inevitably save your life. You will never have to worry about running out of fuel when you are out on the water. This will help you avoid any potential emergencies or disasters.

Solar Panel Placement

This is where most caution needs to be taken. When choosing where you are going to place your solar panels on your yacht or boat, you need to take two big things into consideration: shading and security.

When it comes to shading, you want to make sure you place your panels in an area that receives the most sunlight. Having your boom shade some of the panels, or any lines can reduce your energy production. The wiring of solar panels can also be delicate. That is why you need to place your solar system in the most secure spot possible – rough seas or choppy waters could lead to a wire shaking loose.

If you’re longing to make a maintenance upgrade to your nautical vessel, a solar system should be seriously considered. Not only will it reduce noise, weight, and fueling costs, but it will differentiate your boat from all the other vessels at your next port.

Whether you have questions about panel placement, efficiency, or just if your boat is right for solar, please click here to speak to an expert!

Solar Panel Installation Process

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Yacht Solar: Exploring the Advantages of Flexible Solar Panels for Boats

When it comes to sailing the open waters, boat owners are constantly seeking innovative ways to enhance their boating experience while being mindful of the environment. One such breakthrough in marine technology is the utilization of flexible solar panels for boats. In this article, we will delve into the world of marine solar panels, discussing their benefits, applications, and the various options available in the market.

Sailing enthusiasts are increasingly turning to flexible solar panels as a viable solution to power their boats sustainably. These innovative panels offer significant advantages over traditional rigid solar panels, making them a popular choice among boat owners worldwide.

1. Understanding Flexible Solar Panels for Boats

1.1 what are flexible solar panels.

Flexible solar panels, also known as thin-film solar panels, are made of lightweight and flexible materials such as amorphous silicon. This flexibility allows them to conform to various curved surfaces on boats, making them an excellent choice for marine applications.

1.2 How Do Flexible Solar Panels Differ from Conventional Panels?

Unlike conventional solar panels that use rigid crystalline silicon cells, flexible solar panels use thin-film technology, which makes them more versatile. Traditional panels are bulkier and heavier, while flexible panels are lightweight and easy to install.

1.3 The Advantages of Using Flexible Solar Panels on Boats

The benefits of flexible solar panels on boats are manifold. They are lightweight, durable, and resistant to impacts, making them ideal for marine environments. Additionally, their flexibility allows them to fit on curved surfaces, maximizing the use of available space on boats.

2. Addressing Rust Concerns in Marine Solar Panels

2.1 the impact of rust on traditional solar panels.

Traditional solar panels are often mounted using metal brackets or frames. In marine environments, these metal components are susceptible to rust due to exposure to saltwater and humidity. Rust can compromise the structural integrity and efficiency of the panels.

2.2 Why Flexible Solar Panels are Rust-Resistant

Flexible solar panels do not require metal brackets for installation. As a result, they are not as vulnerable to rust as their rigid counterparts. This advantage extends the lifespan of flexible panels and ensures optimal performance even in corrosive marine conditions.

3. Empowering Boats with Solar Panels and Batteries

3.1 combining solar panels with battery systems.

Integrating solar panels with boat batteries creates an independent and sustainable energy system. Solar panels generate electricity during the day, which can be stored in batteries to power various onboard appliances and equipment, even during cloudy or nighttime conditions.

3.2 Advantages of Using Solar Panels for Boat Batteries

Using solar panels for boat batteries reduces the reliance on traditional power sources, such as generators or shore power. This not only cuts down operational costs but also reduces noise pollution and emissions, promoting eco-friendly boating practices.

4. Exploring Flex Solar Panels for Marine Applications

4.1 the versatility of flex solar panels.

Flexible solar panels can be installed on various boat surfaces, including the deck, hull, and bimini tops. Their lightweight and pliable nature allow them to adapt to the unique contours of different boat designs.

4.2 Installing Flex Solar Panels on Different Boat Surfaces

Boat owners can install flexible solar panels using adhesives or by sewing them into canvas materials. This installation flexibility offers convenience and ensures a seamless integration with the boat's aesthetics.

5. The Rise of Flexible Solar Panels in the UK

5.1 marine flexible solar panels in the uk.

The UK, with its extensive coastline and thriving boating community, has seen a surge in the adoption of flexible solar panels. Boat owners are increasingly recognizing the long-term benefits of harnessing solar power for their marine activities.

5.2 Embracing Sustainable Boating Solutions

The popularity of flexible solar panels in the UK reflects the growing awareness and commitment to sustainable boating practices. As environmental concerns mount, the marine industry is actively seeking eco-friendly solutions to minimize its carbon footprint.

6. The Convenience of Boat Solar Panel Kits in the UK

6.1 all-in-one boat solar panel kits.

Boat solar panel kits offer a convenient solution for boat owners looking to embrace solar power. These kits come with all the necessary components, including panels, mounting hardware, charge controllers, and connectors, making installation hassle-free.

6.2 Harnessing Solar Energy Effortlessly

Boat solar panel kits provide boat owners with a simple and effective way to harness solar energy. By generating electricity from the sun, boaters can extend their time on the water without worrying about depleting conventional power sources.

Read   our  top  notch   articles  on  topics  such as  sailing ,  sailing   tips  and  destinations  in  our   Magazine .  

7. Understanding the Issue of Panel Rust

7.1 common causes of panel rust.

Panel rust in traditional solar panels is primarily caused by exposure to moisture and salty air. It can lead to corrosion and decrease the efficiency of the panels over time.

7.2 Preventive Measures and Solutions

Flexible solar panels, being less prone to rust, require less maintenance. However, boat owners can further protect their panels by choosing anti-corrosive mounting options and performing regular inspections.

8. Harnessing the Power of 12V Solar Panels for Boats

8.1 the advantages of 12v solar panels.

12V solar panels are a popular choice for boats due to their compatibility with standard marine battery systems. They are easy to install and can efficiently charge 12V batteries.

8.2 Enhancing On-Board Energy Efficiency

By installing 12V solar panels, boat owners can optimize their onboard energy consumption and reduce the reliance on engine-driven charging methods, saving both fuel and money.

9. The Best Solar Panel Kits for Boats in the UK

9.1 top picks for boat solar panel kits.

Several reputable manufacturers offer high-quality solar panel kits designed specifically for marine applications. Researching and comparing different kits can help boaters find the best fit for their needs.

9.2 Factors to Consider When Choosing Solar Panel Kits

When selecting a solar panel kit, factors such as wattage, efficiency, and durability should be taken into account to ensure a reliable and long-lasting solution.

10. Enjoying the Sun with Boat Sun Power

10.1 embracing solar energy for recreational use.

Solar power enables boaters to enjoy recreational activities without the noise and fumes associated with traditional power sources. It opens up new possibilities for leisurely and environmentally-conscious boating.

10.2 The Pleasures of Environmentally-Friendly Boating

Boat sun power offers a cleaner and greener way to explore the waters, preserving the marine ecosystem and contributing to sustainable tourism.

11. Exploring Marine Solar Panel Kits

11.1 preparing your boat with solar panel kits.

Installing marine solar panel kits requires careful planning and consideration of the boat's layout and energy needs. Consulting with experts can ensure a well-designed and effective solar power system.

11.2 Advantages of Customizable Marine Solar Panel Kits

Customizable marine solar panel kits allow boat owners to tailor the system according to their energy requirements and space limitations. This customization maximizes energy output and overall efficiency.

12. Sailing the Future: Solar Sailboats

12.1 the concept of solar sailboats.

Solar sailboats take sustainability to new heights, utilizing large solar panels to power electric propulsion systems. These futuristic vessels offer emissions-free and silent sailing.

12.2 Eco-Friendly Sailing with Solar Power

Solar sailboats pave the way for eco-friendly yachting, promoting renewable energy use and reducing the environmental impact of maritime travel.

13. Optimizing Sailboat Solar Panel Mounts

13.1 choosing the right solar panel mounts for sailboats.

Selecting the appropriate solar panel mounts is crucial for maximizing energy production. Properly positioned panels receive the maximum sunlight exposure throughout the day.

13.2 Ensuring Optimal Sunlight Exposure

By strategically installing sailboat solar panels, boat owners can capture more sunlight, ensuring a steady flow of clean energy for their sailing adventures.

14. Sailing with Solar Power: Harnessing the Sun

14.1 how solar panels enhance boat efficiency.

Solar panels offer boat owners a reliable and renewable power source, reducing the reliance on traditional fossil fuels and enhancing overall energy efficiency.

14.2 The Future of Solar-Powered Sailing

As technology advances and renewable energy becomes more accessible, the future of solar-powered sailing looks promising, with boats becoming even more eco-friendly and sustainable.

15. Finding the Best PV Panels for Boats

15.1 understanding photovoltaic panels.

Photovoltaic (PV) panels are the heart of any solar power system. Understanding their efficiency and construction is essential for selecting the best PV panels for boats.

15.2 Selecting High-Quality PV Panels for Boats

High-quality PV panels offer better performance, durability, and longevity. Investing in top-tier panels ensures a higher return on investment and a more eco-friendly boating experience.

Embracing solar technology in the form of flexible solar panels offers boat owners a clean, sustainable, and cost-effective way to power their vessels. The advantages of flexible solar panels, such as their rust-resistance, installation flexibility, and efficiency, make them an ideal choice for marine applications. As the world seeks greener alternatives, the future of boating lies in harnessing the power of the sun, enabling sailors to embark on eco-friendly adventures on their solar-powered yachts.

So  what  are  you   waiting   for ?  Take  a  look   at   our   range   of  charter  boats  and  head  to  some   of   our  favourite     sailing   destinations .  

FAQs: Flexible Solar Panels for Boats

Yes, flexible solar panels are designed to withstand the harsh marine environment. Their durability, impact resistance, and rust-resistance make them ideal for boat applications.

While flexible solar panels can power several appliances, it's essential to assess your energy needs and consider battery storage capacity for consistent power supply.

No, solar sailboats rely solely on the power generated from their solar panels to operate their electric propulsion systems, making them completely emissions-free.

Yes, the flexibility of these panels allows them to conform to various boat surfaces, including curved ones, providing multiple installation options.

Why solar power?

Solar power is the perfect energy source for a yacht. It brings us closer to the beauty and power of nature. Even better than sailing – as it combines the advantages of sailing and motorboating in an unprecedented way.

Capturing maximum amounts of solar energy requires a large area of photovoltaic cells to be directioned at the sun in the most effective way. The top surface area of a yacht can be perfectly suited to this need, at least when that yacht is a multi-hull designed specifically for that purpose. Just like a Silent.

Until the advent of solar sailing, large motor yachts capable of traveling across oceans in comfort had harmful effects on their environment by burning incredibly large amounts of fossil fuels. While their goal is to create an intimate connection with their owners and the seas, they unfortunately heavily pollute the very same waters they travel. Furthermore, not only do diesel engines require a lot of time-consuming maintenance, they create a lot of fumes, vibrations and noise during operation. All these characteristics disconnect the experience on board from the natural surroundings.

Solar yachting is a completely different experience. Using latest technologies in intelligent ways, it is possible to create luxury yachts with infinite range that require virtually no refueling or drive-train maintenance at all. And when cruising in complete silence, at one with the sea and its ecosystem, you do so in total comfort, experiencing the sea and sea life in all new, harmonious ways.

Our founders Michael & Heike pioneered the research for powering yachts with solar energy already during the 1990´s. By personally dedicating years into sea trials, engineering and development, they have fully optimized the solar electric drivetrain for a self-sufficient lifestyle on board. Almost three decades later, Silent leads the way for a more sensible and sustainable approach to luxury yachting through solar power.

By using latest technologies it is possible to create luxury yachts with infinite range that require virtually no refueling or drivetrain maintenance at all.

The Solar Electric Drivetrain

Solar panels

We use the most efficient, most advanced and highest quality modules currently available. Their arrangement, the positioning and the regulation of charge are some of the key secrets and reasons why our yachts are able to harvest incredible amounts of energy from the sun.

Whenever the sun is not shining or more power is needed than the solar panels produce at that time, they provide energy for the propulsion system and all household appliances. Our water cooled lithium batteries provide top notch reliability, safety and performance.

Electric motors

All our yachts are equipped with industry leading dual electric motors. With large amounts of instantly available torque, they enable a powerful and smooth drive which is completely free of unpleasant noise, fumes and vibrations produced by regular combustion engines.

Range extender

During longer periods of unfavorable weather conditions or whenever higher speeds are required for more than a couple of hours, an efficient diesel generator recharges the batteries. This makes sure you never run out of power, even when the sun in not shining.

Sailing yacht

• Zero emission & environmentally friendly
• Free power by the wind
• Noiseless & fumeless cruising without vibrations

Disadvantages

– Wind is less reliable than the sun – Speed & direction is determined by the wind – Power for on board appliances only provided by diesel engine – No energy back-up as wind energy is not stored – Less luxury, space & comfort – High maintenance & operating efforts for sailing rigg – Only noiseless when the wind is coming from the right direction in the desired force – otherwise a sailing boat becomes a motorboat

Solar yacht

Combines the benefits with no drawbacks.

• Eco-friendly with zero emission
• Free propulsion & recharging by the sun
• Energy back-up stored in batteries for several days without sun
• Range extender for longer periods without sun
• You determine speed and direction
• Unlimited range
• High top speed
• Abundance of luxury, space & comfort
• Low maintenance, low operating cost, low operating effort

Motor yacht

• Luxury, space and comfort in abundance
• Consistent high speeds while you also determine the direction

– Severe pollution & environmental impact – Almost permanent fumes, noise and vibrations – High fuel consumption & running costs – High maintenance efforts & costs – Limited range & frequent refueling required – If diesel engines fail, boat stops as there is no back-up

Noiseless With no diesel powered engines required for propulsion, solar electric boats are simply silent.

Fumeless A lack of burned fossil fuels means no more exhaust gases, which pollute the experience and the environment.

Vibrationless In contrast to the smooth drive of electric motors, internal combustion engines create uncomfortable vibrations.

No Forced Docking Conventional motor yachts are forced to regularly undergo inconvenient and expensive docking at crowded fuel stations.

No Costly Fuel Bills Heavy fuel consumption and increasing gasoil prices result in expensive running costs. The sun on the other hand is free.

No Valuable Time Lost The flexibility to recharge the batteries of your yacht wherever you like means you spend more quality time on board.

Unlimited Range Our Silent electric yachts can travel infinite distances by cleverly balancing the energy production and consumption.

Minimal Maintenance Electric motors and their drivetrains have very few moving parts with barely any maintenance required.

Much Lower Running Cost A minimal amount of maintenance means significantly lower running costs needed for the yacht to remain in shape.

Silent Group

Our charters offer you the opportunity to book a memorable vacation on board of our electric yachts. Including our helpful crew, consisting of a captain and a chef, you will experience the comfort of solar powered yachting.

As the pioneers of solar yachting, we have almost three decades of experience regarding the research, design and build of electric yachts. Our team, shipyard and the hiring of new talent are the backbone of our operations.

By transferring our solar yachting technology, Silent Resorts develops sustainable beachfront resorts in beautiful locations worldwide. Memberships offer full or part ownership of an eco-property and a Silent yacht.

Create your infinite playground on the water. A selection of premium electric water toys, which can be recharged by simply connecting them to your Silent yacht, as well as other accessories for the ultimate experience on board.

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SUNREEF 60 ECO SURREAL SOLAR POWER BREAKTHROUGH

Surreal is a recently launched Sunreef 60 sail catamaran combining the shipyard’s expertise in luxury catamaran design with the latest Sunreef Yachts Eco  green tech solutions. 

The new  Sunreef 60 Eco Surreal, is the first 60 foot catamaran that was equipped with in-house developed composite-integrated solar panels built into the yacht’s hull sides, superstructure and bimini roof, maximizing solar power generation and offering unrivalled energy efficiency for long, vibration and fume-free navigation as well as for the appliances on board.

With a thickness below 1mm, the ultralight solar skin is the industry’s lightest and most efficient solar power solution.

Thanks to their advanced integration technique,  Sunreef Yachts Eco  solar panels have a very high resistance to shock and abrasion. The catamaran was also fitted with a powerful custom-engineered battery bank.

The luxury sail yacht welcomes up to eight guests thanks to a smart and spacious 4-cabin layout. With a fully-equipped galley placed down in the starboard hull, the catamaran’s saloon offers generous lounging and dining areas. The custom designed interior and furniture are both contemporary and timeless.

The catamaran’s alfresco relaxation spaces include a large flybridge with a wet bar, a sunken lounging area on the foredeck and a full-beam aft cockpit with a big swim platform.

The flybridge on board Surreal welcomes guests to an immense lounge with a bar and a large c-shaped settee.   

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A Guide to Yacht Solar Panels and Wind Generators

• by yachtman
• September 9, 2023 August 26, 2023

Yacht solar panels and wind generators are innovative sources of renewable energy for marine vessels. Designed to capture the power of the sun and wind, these technologies provide an eco-friendly alternative to traditional fuel-powered systems. Yacht owners can reduce their carbon footprint while enjoying a sustainable and autonomous power source.

In recent years, solar panels have grown in popularity. Technology has improved, and people are more aware of environmental sustainability. These panels are typically installed on the deck or roof of a yacht. Photovoltaic cells convert sunlight into electricity , which can charge batteries or power appliances.

Wind generators also generate renewable energy. Turbines mounted high above the waterline capture kinetic energy from the wind. Rotating turbines produce electricity, which can be stored or used immediately.

Solar panels and wind generators can work together, complementing each other’s performance. Yachts with limited space for solar panels can benefit from wind generators. They generate power even when sunlight is scarce.

The idea of using natural sources to power yachts dates back decades. Sailing enthusiasts sought greater independence from fuel-based propulsion systems. Technology advanced, and solutions that could withstand harsh marine environments became more efficient and affordable.

Today, yacht owners are embracing these eco-friendly technologies. The combination of solar panels and wind generators provides a clean energy solution and reduces reliance on external fuel sources during extended voyages. By utilizing these renewable energy alternatives, yachts can navigate the open waters with minimal environmental disturbance. Sailing can be truly sustainable and enjoyable!

Benefits of Using Solar Panels and Wind Generators on Yachts

Solar panels and wind generators offer many advantages to yacht owners. Let’s explore them!

• 1. Renewable Energy Source: Solar panels and wind generators make use of nature’s power, providing an eco-friendly and sustainable energy alternative.
• 2. Cost Savings: Solar panels and wind generators generate electricity at no fuel expense, helping to reduce energy costs.
• 3. Eco-Friendly Solution: By relying on renewable energy sources, yachts can decrease emissions and contribute to a greener environment.
• 4. Quiet Operation: Unlike noisy diesel generators, solar panels and wind turbines are silent, resulting in a peaceful yacht experience.
• 5. Reliable Power Supply: Thanks to advanced technology, solar panels and wind turbines are becoming more efficient and reliable, even during lengthy voyages.

Plus, modern solar panel arrays and compact wind turbines save space without sacrificing style or functionality. On top of that, these systems are low maintenance due to their durable design.

As proof of their effectiveness, Captain James sailed across the Atlantic Ocean using only solar panels and wind generators. Despite some challenging weather, he never experienced any power shortage. This is a testament to how solar panels and wind generators offer trustworthy and sustainable energy sources.

Selecting the Right Solar Panels and Wind Generators for Your Yacht

Choosing the best solar panels and wind generators for your yacht requires thought. First, consider the size and power needs of your vessel. Then, think about the weather you’ll face on your voyages as it impacts the efficiency of both types of energy. Lastly, budget is an important factor.

To help, we made a table of the best solar panels and wind generators for yachts. It has brand, power output, dimensions, weight, and price range. This data helps you make a wise choice.

Additionally, some solar panels are flexible and lightweight – great for small boats. Some wind generators have features like quiet operation or easy installation .

A friend of mine had a yacht and was planning a long voyage. He didn’t invest much in solar and wind due to money. On the journey, there were days of minimal sunlight without enough power from the wind generator . He was stranded until he could recharge the batteries or find another power source.

Getting the right solar and wind is essential for yachts that want to go on trips or stay still without shore power or fuel energy. To pick the best, consider size, power needs, weather, and budget .

Installation Process of Solar Panels and Wind Generators on Your Yacht

Installing solar panels and wind generators on your yacht is a must! Precision and expertise are key for optimal energy production. Here’s a guide to get you going:

• Pick the correct spot: Check the deck space, sun exposure, and wind patterns to get the most out of your setup.
• Secure the gear: Once you know where to put it, fasten the solar panels and wind generators to the deck or mast. Make sure they’re solid to handle rough weather.
• Hook up wiring: Now that it’s in place, connect the wiring to get electricity from the solar panels and wind generators. Use marine-grade wires for safety.

For extra help:

• Talk to pros: Get assistance from specialists in solar panel and wind generator installations. Their insight can help you make the best decisions.
• Store energy: Think about installing efficient batteries. They can save excess energy produced by the solar panels and wind generators, so you have power even when there’s low sun or no wind.
• Keep up maintenance: Have regular inspections and maintenance checks for your solar panels and wind generators. Clear away debris and keep them running great.

Follow these steps and take these tips and you’ll be able to install solar panels and wind generators on your yacht! You’ll reduce your carbon footprint and enjoy a greener yachting experience.

Maintenance and Care for Yacht Solar Panels and Wind Generators

Maintaining and caring for yacht solar panels and wind generators is a must for their optimal performance and long life. Here are some crucial points to keep in mind:

• Inspect them regularly for any signs of damage or wear.
• Clean surfaces with a non-abrasive solution to remove dirt, salt, and other debris.
• Tighten connections and ensure they are secure.
• Check wiring for frayed ends; repair or replace them as needed.
• Store them in a safe place when not in use.
• Hire a professional technician for regular maintenance and servicing.

Using renewable energy sources like solar panels and wind generators on your yacht is not only good for the environment, but it also saves you money on fuel costs. Plus, these eco-friendly alternatives require minimal maintenance compared to traditional power sources.

Safety is key when working with solar panels and wind generators. Wear protective gear such as gloves and goggles to prevent accidents or injuries.

Now here’s a piece of history related to yacht solar panels and wind generators. In the 1960s sailing renaissance, John Elderkin created a wind generator prototype for his yacht. This innovation enabled him to utilize the power of wind for navigation equipment while at sea. It was the foundation of modern-day yacht solar panels and wind generators.

By taking proper care of your yacht’s solar panels and wind generators, you can enjoy clean energy on your sea adventures while making sure they last.

Maximizing energy efficiency with Solar Panels and Wind Generators on Yachts

Solar panels and wind generators can maximize energy efficiency on yachts. Solar panels use photovoltaic cells to turn sunlight into electricity. This is a clean, renewable energy source. Wind generators use turbines to generate electricity in windy conditions.

Solar panels are highly efficient in direct sunlight. Wind generators work best in moderate to high winds.

Solar panels need to be mounted on the deck or roof of the yacht with wiring. Wind generators go on the mast or other elevated spot and need secure mounting.

Maintenance is key for both types of generators. Solar panels must be cleaned. Wind generators need inspection and lubrication of parts. Bad weather can damage both.

For best results, consult a professional installer for guidance on equipment and installation.

Conclusion and Final Thoughts on Yacht Solar Panels and Wind Generators

Wrapping up our chat on yacht solar panels and wind generators, it’s clear they have an impact on sailing power. Integrating them ensures reliable, sustainable energy on board, so you don’t have to rely on traditional fuel-powered systems.

These renewable energy sources have many perks. They’re silent and don’t produce emissions. This means a cleaner environment and less noise pollution. Also, they let you stay at sea longer without worrying about fuel availability or cost.

Solar panels capture and convert the sun’s energy into usable power. Coupled with wind generators, you get consistent energy from sun and wind. Plus, these systems are designed to stand up to harsh marine conditions, like strong winds, saltwater, and UV radiation.

This is a real perk: Boat International Magazine says transitioning to renewable energy sources like solar panels and wind generators can save yacht owners up to 60% in fuel costs.

Frequently Asked Questions

Q: What is the purpose of yacht solar panels and wind generators? A: Yacht solar panels and wind generators are used to generate clean and renewable energy for powering various electrical systems on a yacht, reducing dependency on engines and fuel consumption.

Q: How do yacht solar panels work? A: Yacht solar panels work by converting sunlight into electricity through photovoltaic cells. The panels collect photons from the sun, which create an electric current that can be used to charge batteries and power appliances on the yacht.

Q: What are the benefits of using yacht solar panels and wind generators? A: The benefits of using yacht solar panels and wind generators include lower fuel consumption, reduced carbon footprint, noise-free power generation, and longer battery life. They also provide self-sufficiency and are environmentally friendly.

Q: How much power can yacht solar panels and wind generators generate? A: The power generated by yacht solar panels and wind generators depends on several factors such as the size and efficiency of the panels, the amount of sunlight or wind available, and the energy needs of the yacht. It’s recommended to calculate power requirements before installation.

Q: Can yacht solar panels and wind generators be used together? A: Yes, yacht solar panels and wind generators can be used together to optimize energy generation. This combination provides a more consistent power supply as solar panels work during the day and wind generators produce energy even at night or when there is less sunlight.

Q: What should be considered when choosing yacht solar panels and wind generators? A: When choosing yacht solar panels and wind generators, factors such as the size and weight of the panels, the available space on the yacht, the type of battery system, and the power requirements should be taken into consideration. It’s also important to choose reliable and efficient products from reputable manufacturers.

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This yacht sets sail with solar

The 60 square meters of solar panels produces 30-50 kWh of energy per day, enough to power all of the onboard electronic equipment for around seven hours.

• Commercial & Industrial PV

Solar-powered Baltic yacht.

Image: Solbian Solar

Baltic Yachts began delivery in July of its Baltic 146 Path, which includes an 8,714 watt solar rooftop and energy storage system designed by Solbian Solar using the company’s walkable solar modules.

Recently, some of the yacht’s technical work has been shared online. Built from 1,742 monocrystalline solar cells, many of the 86 solar panels were custom cut to fit the deck’s shape by the Solibian team in Italy. The units were based on the company’s Super Rugged (SR) Series .

The SR series has solar cell busbar technology developed by Merlin Solar. In one video, the Merlin team drives over the solar panel, throws bags of cement on it, and even shoots it with a bow and arrow in an effort to prove the product’s resilience. The company said its busbar technology makes this kind of abuse possible.

The 60 square meters of solar panels produces 30-50 kWh of energy per day. The company said that’s enough to power all of the onboard electronic equipment–including navigation, autopilot, lighting, and entertainment–for around seven hours.

Once the sun goes down, a Mastervolt MLI 44kWh LiFePO4 battery pack allows the diesel generator mostly to stay off, providing generally silent operation for 14-18 hours.

Baltic Yacht’s solar system is roughly half the size of the Silent 60’s 16.8 kWdc solar plus storage system. The Silent 60 is a solar-propelled yacht less than half the lengthBaltic yacht and price, which reaches 6-8 knots on solar power alone. The Path does not feature electric propulsion and therefore relies on diesel engines when the wind dies down.

Since the Path uses a sail for propulsion, the team installed 154 bypass diodes and 12 solar panel strings and trackers – Mastervolt SCM-60 MPPTS – in an effort to maximize power output and minimize the effect of the sail’s shadows on the panels. The entire solar system, including wiring, controllers and small parts, weighs less than 300kg, the company said

The 146 Path has an overall length of 146 feet. The yacht can accommodate eight in addition to the ship’s owner, as well as eight crew members. Path carries two tenders, an 8hp Torqeedo electric outboard-powered RIB, and a 6.5m twin-engined RibEye. There are also two ultra-lightweight Reverso Match sailing dinghies.

When the front tender is deployed, its storage container can be turned into a pool.

The ship’s main diesel engine is a 405kW (550hp), six-cylinder Scania. The specific model isn’t listed, however the “ DI13 092M IMO Tier III, EU Stage IIIA ” lines up with all of the stats and looks like the unit in a video of the engine being installed.

The owner’s suite includes a sleeping cabin, and an en suite lounge with a glass divider doubling as a movie, tv, and sailing information screen. An upper lounge features a 2.7m-long video wall.

This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: editors@pv-magazine.com .

John Fitzgerald Weaver

More articles from John Fitzgerald Weaver

People on the Move: ACORE, Sunnova Energy, Lighthouse bp, and more

Sandia offers public access to csp archives, related content, elsewhere on pv magazine....

Since it is E propulsion all they have to do to change while sailing is use the motor in regen it’ll generate power back into the pack at much larger amounts. And a small RE fueled generator just in case. As a sailor who does solar, not a chance it’ll get that much from the solar from all the shading from the rigging. More likely 10-30kwh/day. On mine, I made the sails small with 2 masts so I can lower them to not shade the panels.

Any photos of your boat you can share?

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California's Boating & Fishing News

Image courtesy of Sun Powered Yachts

Navigating the Seas of DIY: A Sailor’s Guide to Solar Panel Installation

In the world of sailing, mastering the art of boat maintenance is as essential as hoisting the sails themselves. For seasoned sailors and newcomers alike, embarking on a DIY project to enhance their vessel can be both rewarding and practical. From routine checks to transformative upgrades, here’s a comprehensive look at a DIY project that sailors can undertake to ensure their boat is shipshape and seaworthy.

Project Title: Installing a Solar Panel System

With a growing emphasis on sustainability and energy efficiency, installing a solar panel system on a boat has become an increasingly popular DIY project among sailors. Not only does it offer the convenience of generating electricity on board, but it also reduces reliance on traditional power sources and minimizes environmental impact.

Marine solar panels are crafted to endure harsh marine conditions, using corrosion-resistant materials like aluminum frames and tempered glass. They’re compact and lightweight, fitting well on boats with limited space and can even flex to fit curved surfaces. Products such as the 140 Watt Flexible Marine Solar Panel from Sun Powered Yachts offer 140 Watt Semi-flexible Marine Solar Panels that are ideal for mounting on a bimini top or a curved deck surface. These panels offer diverse mounting options, with specialized hardware for secure attachment. Marine Solar panels feature enhanced waterproofing, often meeting IP67 or IP68 standards and include safety features like overcharge protection. Across the board, marine solar panels ensure reliable and efficient power generation for boats and yachts, contributing to sustainability and energy independence.

Materials Needed:

• Solar panels
• Charge controller
• Battery bank
• Mounting hardware
• Wiring and connectors
• Tools (drill, screwdriver, wire cutters, etc.)

Step-by-Step Guide:

• Assessment and planning:  Begin by assessing your boat’s layout and determining the optimal location for mounting the solar panels. Consider factors such as sun exposure, available space and accessibility. Plan the layout of the system, including the placement of panels, controller and battery bank.
• Selecting solar panels:  Choose high-quality marine-grade solar panels designed to withstand the rigors of marine environments. Consider factors such as wattage, size and efficiency to meet your energy needs.
• Mounting solar panels:  Install mounting brackets or racks on the boat’s deck or cabin roof using appropriate hardware. Ensure that the panels are securely attached and positioned at an angle to maximize sun exposure.
• Wiring and connection:  Connect the solar panels to the charge controller using suitable wiring and connectors. Follow manufacturer instructions and adhere to proper safety practices. Route wiring neatly and securely, avoiding potential hazards or obstructions.
• Installing charge controller:  Mount the charge controller in a well-ventilated and easily accessible location. Connect the controller to the battery bank, ensuring correct polarity and wiring configuration. Set up any additional features or settings according to manufacturer guidelines.
• Connecting battery bank:  Install the battery bank in a designated compartment or storage area, securely fastening it to prevent movement. Connect the battery bank to the charge controller, fuse box and onboard electrical system.
• Testing and commissioning:  Once the installation is complete, conduct thorough testing to ensure the system functions properly. Verify that solar panels are generating electricity and charging the battery bank efficiently. Test all electrical connections and components for any signs of malfunction or irregularity.
• Maintenance and monitoring:  Regularly inspect and maintain the solar panel system to ensure optimal performance and longevity. Clean panels periodically to remove dirt, debris, or salt buildup. Monitor battery voltage, charge levels and system operation to address any issues promptly.

Embarking on a DIY solar panel installation project can empower sailors to harness the power of the sun and reduce their environmental footprint while enhancing onboard comfort and convenience. With careful planning, proper installation and ongoing maintenance, sailors can navigate the seas with confidence and sustainability, one solar panel at a time.

Additional Resources:

• Online tutorials and guides
• Marine electronics retailers
• Boatbuilding and maintenance forums
• Professional marine electricians or technicians for consultation

Editor’s Note:

While the DIY tips and projects outlined in this article offer valuable insights and guidance for boat maintenance, it’s important to emphasize that they are intended as suggestions and recommendations. Every boat is unique, and the scope of maintenance and repair tasks may vary depending on factors such as vessel size, age and configuration.

Boaters should exercise caution and discretion when undertaking DIY projects, especially those involving electrical systems, structural modifications or other complex tasks. Prioritize safety at all times and consult professional marine technicians or experts when in doubt.

Additionally, The Log recommends that readers conduct thorough research, seek multiple sources of information and consider their own skill level and experience before attempting any DIY projects. While these projects can be rewarding and cost-effective, they should never compromise the safety or integrity of the vessel.

Ultimately, the goal of DIY boat maintenance is to empower boaters to take an active role in caring for their vessels and enjoying the maritime lifestyle to the fullest. Whether tackling minor repairs, upgrades or routine maintenance tasks, boaters should approach DIY projects with diligence, patience and a commitment to quality craftsmanship.

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The 6 Best Marine Solar Panels of 2024

This post may contain affiliate links. Please read our disclosure policy .

The best marine solar panels can keep boat batteries topped off so that your bilge pumps, navigation lights, GPS systems, depth finders, and other electronics continue to run smoothly and efficiently. By combining marine solar panels with a charge controller that can regulate the sun’s energy into a deep cycle or lithium battery bank, you can create your own electrical grid for those long days spent at sea.

Or, you can use solar panels to supplement shore power when you’re docked in a marina to help cut back on costs. 

There are two main types of solar panels that can be utilized on boats: Flexible and fixed, which come in a variety of different sizes and power wattages. Depending on factors like usage and the size and type of your boat, the best marine solar panel will vary.

To come up with our list of the best marine solar panels, we looked at dozens of options from well-established solar companies. We considered their efficiency, wattage, size, customer reviews, and ratings, pricing, and even compared top picks with our own first-hand experience. Ahead, check out our recommendations. 

Our Top Picks:  

• Our Top Pick:  Renogy 100 Watt 12 Volt Monocrystalline Solar Panel – $99.99 at Amazon
• Best Flexible Marine Solar Panel : N ewpowa Flexible Solar Panel 100 Watt 12 Volt – $99.99 at Amazon
• Best Budget Marine Solar Panel : HQST 100 Watt 12 Volt 9BB Monocrystalline Solar Panel – $69.99 at Amazon
• Best Rigid Marine Solar Pane l: SUNER POWER 50 W 12 V Solar Battery Charger – $119.95 at Amazon
• Best Portable Solar Panel: DOKIO 160 Watt 18 Volt Portable Solar Panel Kit Folding Solar Charger – $159.77 at Amazon

Reviews of The Best Marine Solar Panels

1. our top pick: renogy 100 w 12 v monocrystalline solar panel.

Our top pick for the best marine solar panels comes from Renogy, perhaps one of the most well-known brands in DIY solar panel installation. Renogy’s 100-watt monocrystalline solar module is proof that a simple design can sometimes be the best. Although it doesn’t include built-in controllers, it excels at all the basics.

The panel has an impressive 22% efficiency (the typical solar panel range is between 18% and 23%) and a guaranteed positive tolerance, which means users can expect a minimum output of 100 watts. It’s also made from high-quality materials like corrosion-resistant aluminum and boasts notable industry certifications from TUV Rheinland and Intertek . That said, the waterproof rating of the junction box is not well suited for total immersion (but is protected against rain or waves), so just make sure you securely mount these panels. 

• Power Rating: 100 W
• Claimed Efficiency : 22%
• Weight: 14.1 lb
• Dimensions: 41.8″L x 20.9″W x 1.38″H
• Waterproof Ratings: IP65 (junction box), IP67 (connectors) 
• Mounting Options: Clamp using mounting holes
• Excellent build quality
• Guaranteed positive tolerance (0-4%)
• Great ratings 
• Moderate price
• Basic design
• Mounting can be difficult for inexperienced users

What Others Are Saying:

Renogy’s 100 W panel has a 4.7-star rating from more than 6,370 Amazon ratings.  Sail Magazine , EcoWatch , and Futurism all chose the Renogy 100 W panel as their best overall marine solar panel, too.

Buy the Renogy 100W 12V Monocrystalline Solar Panel:

2. Best Flexible Marine Solar Panels: Newpowa Flexible Solar Panel 100 W 12 V

This pick from Newpowa is easily one of the best flexible solar panels for boats. Weighing in at a little over four pounds — about a third of a rigid solar panel of the same size – the module uses high-quality SunPower solar cells and sturdy ETFE binding for durability. Its thin design allows it to easily be mounted on biminis or directly on curved deck surfaces, and the MWT (metal wrap through) technology eliminates bus bars on the front side, improving power output .

It’s worth noting that flexible marine panels are often slightly less efficient than rigid panels, but this 100-watt panel from Newpowa maintains a 20% efficiency – one of the highest available for flexible panels. The waterproof rating of the junction box is an impressive IP68, meaning it can be immersed in water for long periods. 

• Claimed Efficiency : 20%
• Weight: 4.19 lb
• Dimensions: 41.34” L x 21.26” W x .12” H
• Waterproof Ratings: IP68 (junction box), connectors not specified
• Mounting Options: Tie-down using grommets; caulk/paste to hull
• State-of-the-art MWT technology
• Lightweight and compact design
• Reasonably-priced
• Durable construction
• No adhesive back surface for pasting

One of the best marine solar panels for flexibility, the Newpowa 100 W panel has a 4.6-star rating from more than 1,200 Amazon shoppers.  

Buy the Newpowa Flexible Solar Panel 100 W 12 Volt:

3. Best Budget Marine Solar Panel: HQST 100 W 12 V 9BB Monocrystalline Solar Panel

This 100-watt solar panel from HQST has a ton of great features for a decently affordable price. It comes with a 9-busbar construction that helps to achieve an efficiency rate of up to 23% – the highest we’ve found. For some, the square-shaped design may be more helpful for installation, especially in compact spaces. 

The panel is also made with top-quality materials, like high-purity silicon cells and multi-layered sheet laminations. It’s rated to IP65 to protect against low-pressure water jets from any direction (like hard rain), but cannot be fully immersed in water.  

• Claimed Efficiency : 23%
• Weight: 14.82 lb
• Dimensions: 32.5″L x 26.4″W x 1.18″H
• Waterproof Rating : IP65 (junction box and connectors)
• Inexpensive
• High efficiency
• Compact, wide-body design
• Wide-body design may be difficult to mount in elongated spaces 
• Some reviews mention it didn’t achieve the advertised maximum efficiency

The HQST 100 W monocrystalline solar panel is one of the best marine solar panels: It was featured as a runner-up in Futurism’s list of best marine solar panels. It is also among Electric Rate’s picks for best marine panels. 

Buy the HQST 100 W 12 V 9BB Monocrystalline Solar Panel:

4. Best Rigid Marine Solar Panels: SUNER POWER 50 W 12 V Solar Battery Charger 

Very few rigid solar panels on the market come with an integrated MPPT charge controller and adjustable mounting bracket, especially at the price of the Suner Power 50 W panel. While the solar panel itself is a basic, monocrystalline module, the built-in controller eliminates the need for buying, mounting, and connecting another electronic device. 

Another major standout is the adjustable bracket that can allow for more direct sunshine throughout the day, improving power production. However, the cables and controller are not waterproof (only splash/light rain resistant), so you may want to add extra protection if it’s angled in a manner that can expose the controller to heavy rainfall. 

• Power Rating: 50 W
• Claimed E fficiency : 21%
• Weight: 7.7 lb
• Waterproof Rating: IP54 (Controller and cables)
• Dimensions: 23.4″L x 20.5″W x 1″H
• Mounting options: Clamp using mounting holes
• Integrated MPPT charge controller saves hassle
• Integrated adjustable bracket improves output
• Adjustable brackets can be bulky on certain areas of the boat
• 50 W rating may be insufficient for some 

The Suner Power 50 W Solar Panel has a 4.4-star rating from more than 1,300 ratings on Amazon .

Buy the SUNER POWER 12 V 50 W Solar Battery Charger:

5. Best Portable Marine Solar Panels: DOKIO 160 W 18 V Portable Solar Panel Kit Folding Solar Charger

Weighing just 9 pounds, the Dokio 160 W foldable kit was designed for portability. It can be easily carried like a suitcase, but setting it up is just as easy and usually takes less than a minute. Its 160 W rating offers enough power to run several appliances on the boat, plus, it comes with a decent-quality charge controller and cabling accessories.

This portable panel is a great choice for anyone who wants to use it on s hort fishing trips on the lake, day sailing, or even camping, plus, it’s also good to have around as a backup during power outages.  That said, if you plan on using the boat as a liveaboard or for frequent, multi-day boating trips, you’ll probably want to purchase fixed solar panels instead.

• Power rating: 160 W
• Claimed Efficiency : 22-23%
• Weight: 9 lb
• Dimensions: ‎ 20.9″L x 19.3″W x 1.1″H
• Waterproof Rating: IP65 (panel) 
• Mounting options: Lay flat or rest on brackets (sold separately)
• Highly portable
• Lightweight
• May be difficult to mount on some surfaces
• Need to purchase brackets separately

Dokio’s portable solar kits find a spot on several lists of best portable solar panels, including  USA Today , Treehugger , and BBC Science Focus . 

Buy the DOKIO 160W 18V Portable Solar Panel Kit Folding Solar Charger:

Other Marine Solar Panels to Consider

Atem power monocrystalline flexible solar panel 100 w 12 v.

Atem Power’s flexible, all-black solar panel is one of the sleekest-looking marine solar panels on the market. If you have a modern boat or yacht, the Atem Power 100 W Panel will certainly preserve its aesthetic. It also has a low weight of 7 lb and a noteworthy efficiency of 22%. The only downside is that some customers mention a relatively faster rate of degradation, so you probably won’t get full power from it after a few years. The ATEM POWER Monocrystalline Flexible Solar Panel 100 W 12 V is available at Amazon for $119.99.

Renogy Bifacial 115 W 12 V Solar Panel

Renogy’s bifacial solar panel has an innovative design that generates power from both sides. While bifacial modules aren’t super common for marine applications, boats with white hulls reflect enough sunlight to allow the Renogy Bifacial 115 W to generate up to 30% more energy than a traditional panel of the same size. Unfortunately, the Bifacial 115 W Solar Panel isn’t popular among boaters, leaving us with a very small number of first-hand experiences. Since there aren’t a ton of reviews, we didn’t feel comfortable including it in our list of the best. The Renogy Bifacial 115 W 12 V Solar Panel is available at  Amazon for $129.99 . 

XINPUGUANG 400 W Flexible Solar Panels Kit

If you’re looking for a full-fledged solar panel kit that’s capable of powering large boats, the Xinpuguang 400 W kit is a great option. It includes four high-efficiency flexible solar panels, a charge controller, wiring, and connectors. However, if you have some working knowledge of solar panel component selection, you can create your own kit for cheaper — especially because this is one of the priciest options we found at over $400. The Xinpuguang 400 W Flexible Solar Panels Kit is available at  Amazon for $469.90 .  

Topsolar Solar Panel Kit 20 W 12 V

Not everyone is looking to power fridges and computers on their boats — some folks just want to keep their phone battery charged or power a small fan on a hot fishing trip. The Topsolar 20 W kit is a good choice in such cases since it comes with a compact, high-efficiency solar panel, a charge controller, and some cabling. However, because it doesn’t have separate positive and negative terminals with MC4 connectors, wiring is a bit tough. The Topsolar 20 W Solar Panel Kit is available on Amazon for $29.99 . 

Why You Can Trust Us

Hi! My name is Aniket Bhor, and I’ve been passionate about solar energy for the past decade or so. Over the years, I’ve worked at solar power companies on three different continents and written for sites from a dozen countries worldwide. I love using my experience in the solar panel manufacturing, design, and installation sectors to recommend the best products for Go Downsize readers. 

Go Downsize, started by Morten and Maria , is a highly reputable source of information related to downsizing and space optimization. With over 20 million YouTube video views, Morten and Maria’s blog is one of the most trusted platforms on the web for downsizing content, whether it’s related to RVs, boats, or trailer homes.

To come up with our list of the best marine solar panels, I worked with Morten and Maria to consider different factors like efficiency output, power, features, and pricing. We utilized our first-hand experience and discussed our favorite features, ultimately narrowing our roundup down to six of the best options on the market.

What to Know About Marine Solar Panels

Things to Consider When Choosing a Marine Solar Panel

Finding the best marine solar panel will vary. To choose a good option for your needs, you should think about a few different details. 

Power rating

The most important specification to consider when looking at solar panels is their power rating. The rating of a solar panel will tell you how much energy it can generate throughout the day. Naturally, boats with a greater number of appliances will need one or more solar panels with a higher rating. 

Typically, most boats need anywhere between 150 and 300 watts to power a few basic devices such as phones and laptops. Buyers can also use a solar calculator to figure out the correct solar panel size for their needs. This will also vary on the type of batteries you use (deep cycle vs. lithium), and also whether you recharge your batteries with your boat’s high output alternator. 

It is also important to note that the required power rating will change with the location of the application . For instance, solar panels on a boat in Florida or California will generate more power than those on a boat in New York.  

While the power rating of a solar panel signifies how much power it can generate, its efficiency will tell you how much power it can generate per unit space. High-efficiency panels can generate more energy in a smaller space.

Higher efficiency is important particularly for marine applications since there is limited mounting space on a boat. High-efficiency solar panels are typically also built using Grade A or A+ solar cells, which have a low rate of degradation and more reliable performance.

Mounting Options

Most boats or yachts aren’t designed with solar panels in mind. As such, mounting traditional solar panels on the hull can sometimes be challenging. For boats with sufficient mounting space, traditional solar panel designs are perfect, since they’re also cheaper. You can simply clamp the panels on any flat surface with nuts and bolts.

But for boats with uneven surfaces, flexible solar panels can be a great option. Many flexible panels come with adhesive back surfaces — all you need to do is peel off the sticker and paste the solar panel on the hull. If you own two boats that you use alternatingly, you may even want to consider portable solar panels that can be laid down on the boat and packed and moved again within a few minutes.

Build Quality

The best solar panels can last 25 or more years. But on the opposite end of the spectrum, there are solar panels that stop working within two years. Solar panels are complex, sophisticated electronic devices, which means building a good-quality solar panel isn’t an easy feat. 

This makes it important to use products from reputable brands. Top-quality solar panels have a low rate of degradation. For example, a good solar panel will still generate 80% of its rated output after 20 years of operation. Many companies also offer a power production guarantee like the one mentioned above. It is also important to check the warranties on marine solar panels. A panel with a 10-year warranty is obviously a better choice than one with a 2-year warranty.

Waterproof Ratings

Solar panels are designed to be left outside in the rain, but when it comes to the cables or junction boxes, waterproof ratings vary dramatically. When shopping for a marine solar panel, be sure to check the IP ratings on the connectors, because you may want to add additional protection for heavy rain or waves. 

Are Solar Panels Worth it on a Boat?

Yes, solar panels are certainly worth it on a boat. Solar panels are quiet and clean, and there are no hassles of running out of fuel or frequent maintenance. With the right equipment, boat or yacht solar panels can power pretty much anything on a boat, and last for significantly long periods. Moreover, modern solar panels are also much cheaper than their older versions, making them a must-have on any boat. 

If you’re keeping a boat in a marina as a liveaboard, electric power can be notoriously expensive, and solar panels can help reduce the overall cost. For liveaboards on a mooring or anchorage, they’re necessary for keeping things charged (constantly running an engine or generator to charge batteries isn’t really a viable long-term option). Or, when you’re underway on day trips or longer adventures, solar panels can provide backup power in remote areas, so they are an excellent investment for any vessel. 

How to Charge a Marine Battery with a Solar Panel

Charging a marine battery with a solar panel is pretty straightforward. Solar panels generate direct current, which can be sent straight to the battery for storage, so you only need a charge controller to optimize the charging and improve safety. Just connect the solar panel’s terminals to the “PV” ports on the controller and connect the “battery” ports on the controller to a battery using another set of cables. From there, the charging begins.

The size of the battery will dictate the required size of your solar panel. If you have a 50 Ah, 12 V marine battery, this means you have a 600 Wh storage capacity (50 x 12 = 600). A typical, 160 W panel will generate around 600 Wh on a decently sunny day. You can also use a solar battery calculator to figure out the exact combination of solar panels and marine battery you’ll need. 

How to Install Solar Panels on a Boat

There are several ways to install solar panels on a boat. You can do a hard mount by drilling holes and securing the panel with nut bolts, or use a bimini-mounting system. Some solar panels can also be tied down to the boat with ropes or cables.

When installing wiring, you’ll want to invest in through-deck wire seals if you’re drilling holes through into the deck. These help to protect the core of the boat from water intrusion. If possible, it’s best to utilize existing tubing in the pulpits and stanchions to minimize the amount of exposed wiring. 

Thin, flexible solar panels can be pasted to the boat’s surface with an adhesive. However, if not pasted/caulked properly, these panels can catch wind and get damaged or come off entirely. Some good brands of durable adhesives /sealants are Boat Life, 3M, and Sikaflex. 

Solar panels can also be mounted on a pole using the correct mounting brackets. In places where the sunshine isn’t strong enough, it even makes sense to use adjustable brackets which allow you to change the orientation of the panel, helping it absorb more sunlight and generate more energy. These could also be mounted on the sides of the stern pulpit, and fold down or collapse when not in use. 

You can also utilize flexible panels on biminis, or create a solar arch structure that, with fixed or flexible panels, can be combined with wind turbines, antennas, and davits — but it takes some thinking outside of the box and creative designs. Before installing the panels, it might be helpful to map out a few ideas for ways to maximize space options and capture the most sunlight possible. 

How Many Solar Panels Are Needed to Power a Boat?

The number of solar panels needed to power a boat depends on the size of the boat, the number and wattage of the appliances on board, and the power rating of the solar panels. Typically, 200 to 300 watts of panels are sufficient enough to power a small to medium boat if there aren’t any power-hungry appliances on it. Considering the most popular panel size of 100 W, you would need two to three solar panels to power electrical equipment on a boat.

Are There Solar Powered Boats?

It is possible to build a boat that operates entirely on solar power, and several prototypes have already been built and demonstrated. However, to propel an entire boat will need a large number of solar panels. Usually, there isn’t enough space for this on traditional boats or yachts. 

Most solar-powered boats today are engineered to have extremely light structures and aerodynamic designs to minimize the number of solar panels needed. On the other hand, the energy density of gas or diesel is much higher, meaning a small fuel tank and motor can power the entire boat more easily, even if the boat is relatively heavy. Thankfully, marine and sailing yacht solar panels are becoming more efficient, and soon solar-powered boats may become mainstream.

Related Posts

• How Do Boats Have Electricity
• Popular Boats for Living
• How Much Solar Power do Campervans Need?

Prices were accurate at the time of publication. 

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Practical Boat Owner

• Digital edition

Boat solar panels: Everything you need to know to get started

• David Berry
• October 13, 2021

Want to add some boat solar panels, or wonder how to make the most of those you already have? David Berry has some advice...

While it seems like a good idea to mount a panel on the coachroof the chances of it becoming shaded are increased. Here the mast or rigging can easily throw a shadow over at least part of the panel, seriously reducing its output. Photo: Catchlight Visual Services/Alamy

Keeping batteries topped up without resorting to running the engine is an ongoing problem for yachtsmen. Boat solar panels are an obvious option, not just in the Med but also around the coasts of the UK as the price of panels has fallen over the years.

But choosing them can seem a bit of a black art: after all, how can you possibly predict how much sun you’re going to get during the season, or how much power your panel will produce if it’s not exactly aligned with the sun? But provided you accept a statistical approach using established databases, then prediction is easier than you think.

Ultimately the only thing we need to know is the conversion efficiency, or, how much sun turns into electrical power. NASA do a trick: they use multi-layer panels where each layer responds to a different wavelength so the usual 20% or so is doubled.

Article continues below…

Battery maintenance for boat owners: How to look after your boat batteries

For all but the smallest and simplest of craft a reliable supply of battery power is essential to keep both…

What is insolation? How much power is reaching my boat’s solar panels?

The sun is 93 million miles away, give or take. Packets of energy called photons leave it and travel at…

And there is a new material called Perovskite which is also used to provide an overlay on the standard silicone panel and the tandem panel is claimed to convert up to 28% of the sun’s energy into electricity.

Don’t rush though, when I looked on Amazon for one I discovered even the books describing it cost around £100! The panels themselves seem to be still in development.

How much energy does my boat need?

The first step is to work out your boat’s energy requirements. All you have to do is add up all the energy in watt-hours used by each device on your boat, such as the fridge, lights, computers and so on.

Energy is power accrued over time, so if power is measured in watts, energy is watt-hours. This can be tricky, for example how long is your fridge running for? And how about overnight? How much energy do the instruments take? Or your computer?

You can measure the power by measuring the Amps and Volts and multiplying them together to get Watts, but somehow you need to come up with a table similar to the one below. Once you have your energy requirements worked out, I suggest you add a goodly margin for expansion and errors – at least 10%.

Energy requirement for Aderyn Glas over the course of a day. ‘Current’ is Amps. ‘Duty’ is the portion of the day the (12V) appliance is powered up. eg Fridge 4A x 12V x 12hr = 576Wh

Next, you need to decide how much of this requirement should be met by the boat solar panels. We sail our Moody 33 Aderyn Glas throughout the summer season from our base in Preveza, Greece, so our requirements are essentially those of liveaboard sailors.

We want the panels to be able to supply most of our power needs and allow us not to have to ruin the peace of a quiet anchorage by running the engine simply for charging.

Weekend sailors might be content with a small panel to recharge – over the course of a week – the energy used during a weekend’s sailing. Getting the balance right is important, especially if you want to install enough boat solar panels to more or less cover your power requirements.

David Berry’s Moody Eclipse Aderyn Glas has boat solar panels mounted on a stern gantry where shadows are greatly reduced

But will you get the quoted wattage from your panel? If the panel is a 100W panel, will you get 100W? Panels are rated as the electrical power produced under certain strict test conditions, and these are solar irradiation (called insolation) of 1,000W/m2 at 25°C and an atmosphere of a particular clarity. Do we ever get these conditions in practice? Well, yes, we do, but life is never that simple – in this article I explain about how to assess the real insolation over the course of a day in your chosen location.

Types of boat solar panel

Leaving aside the exotic new Perovskite panels, there are three types that you might consider – a choice that hasn’t changed in years.

There are amorphous panels (good in shady conditions but large for any given wattage), printed panels (manufactured with an inkjet printer but really low conversion efficiency) and crystalline panels either poly- or mono-crystalline.

The smaller amorphous panel is 15W and the larger crystalline panel is 100W. So the larger panel is approximately twice the area, but seven times the power

What type of boat solar panels should I fit?

This question is a bit of a red herring – in reality, the question should be ‘How much space do I have?’

The academic drive is to make panels that are more environmentally friendly, both to make and dispose of, and to reduce the cost per watt.

But ironically this has resulted in a much poorer conversion efficiency generation by generation, which is not helpful to sailors with a small area available to mount the panels.

These panels are printed on a continuous inkjet printer with the idea that they can effectively be an endless strip. The problem with that, though, is the current can build up and eventually burn out the connecting cables. Furthermore, they are no good for yachts because the conversion efficiency is so low so you’d need a battleship in order to have enough space!

So, back to the first generation: crystalline panels come in mono- or polycrystalline species, but they only differ slightly in cost per watt and efficiency.

Added to the mix is the flexibility aspect: flexible panels require a bit of clever manufacture, and this is passed on in higher prices.

Many sailors think flexible panels are a solution because they can be mounted on the deck or coachroof or even the bimini but I’ve not considered them because all those places seem to suffer from shading, more of which later.

A hypothetical energy balance. The red line is the clear-sky power that the panel could provide during daylight. The blue line is the power your boat requires. Light blue is surplus energy, where the panel is outputting more than the load, and dark blue is where the load is greater than the panel can deliver. When night falls, the boat’s energy needs have to be met by the battery. In daylight, the battery becomes a load for the panels as it is charged. The green line is a notional illustration of the state of the battery; it winds downwards when there’s a shortfall and upwards when there’s a surplus available for charging. In winter, the load profile will be different and the captured power will be lower.

So does this mean the default starting point for any installation is a rigid, crystalline panel? In short: yes!

Where should I install my boat solar panels?

If you’re just fitting a small panel to top-up batteries on a mooring, buy a cheap rigid panel and find places on your boat where you can tilt it to catch the sun’s rays for the majority of the day.

We do this during the winter in Greece, where we strap on 20W or so of car battery top-up panels, and it works well for us. Choose a spot that isn’t shaded for the majority of the day and this technique should serve you well.

Do the sums. I have heard of people whose batteries have been damaged by a constant high power being applied to an already charged battery, even through a regulator. My rule of thumb for trickle-charging is a panel wattage about 10% of the battery’s stated amp-hours, but that’s a guess.

Aderyn Glas is fitted with two monocrystalline panels which are rated at 100W apiece – they take the same space previously occupied by amorphous panels which could only muster 75W between them

If you spend more time on board and need to get the best from your panels, mono- or polycrystalline panels will give more power from the same space. We replaced our 75W bank of amorphous panels with 200W of monocrystalline panels in the same area.

But with the higher efficiency comes higher sensitivity to poor mounting conditions, so if you want the best from your panels you need to do your utmost to ensure they’re not shaded, and also that they are tilted as close to a right-angle to the sun as possible. This is why liveaboards often mount theirs on adjustable gantries at the stern or on the pushpit.

Intrinsic losses

Let me just revisit this: the relationship between the nominal power of a boat solar panel and what you really get. When the manufacturer quotes, for example, 100W for a panel, that is the expected output under test conditions.

Choose your site carefully – this coachroof panel will be shaded by the boom, reducing its output by a considerable margin

The test conditions are an insolation of 1,000W/m2 at 25°C. So a typical panel of half a square metre will receive 500W of insolation, then we multiply by the efficiency of 22% or 0.22 and you get roughly 100W. So if you get a sunny day that insolates your 100W panel at 1kW/m2 then you have the potential to get 100W output for a short time around solar noon.

But the energy over 24 hours will be below this owing to the declination of the sun over the course of the day. This can be partly remedied with a tracking panel, but as the sun declines the light has to pass at a more oblique angle through the atmosphere, hence losing power.

The insolation will also be affected by your latitude, and by any form of shading or scattering from atmospheric dust, haze or cloud. Another important intrinsic loss is that heat reduces a panel’s output by about 5% for every 10°C rise in temperature greater than 25°C. For this reason, it’s quite possible to get a higher output from a boat solar panel in cooler northern latitudes than on the Equator!

This is the comparison between an MPPT controller and a PWM type over a 30 minute periodSo you see what I mean when I say the question is all about how much space you have: the default option should be a crystalline panel because it has the best watt per unit area coupled with price per watt, and we only need to deviate from this simple first-generation solution if other factors are important.

Cost and efficiency

Since we’re only talking about crystalline panels the efficiency is always going to be around 20% and the cost less than £1/Watt.

There are a large number of suppliers out there now but I should stick to the well known names such as Kodak, Polaroid, LG, Panasonic and Victron.

For suppliers I would look at Amazon (of course) or, in the UK, Midsummer Energy which stocks not just panels but all the cables and bits you will need to fit them.

Victron MPPT controller

Other boat solar panel system losses

Losses in cables are proportional to the square of the current. The equation is P=(i x 2) x R where ‘i’ is the current in amps, R is the resistance in ohms and P is the power lost in watts. The voltage gradient from the high voltage at the panels to the lower one at the regulator is fixed by the cable resistance and current (Ohm’s law), which is in turn set by how sunny it is and the power required.

But the resistance is a matter of design. To minimise cable losses and prevent potential cable overheating, large-core cables are needed. Resistance is also proportional to the length of the cable, so long cables need to be even fatter than short ones. I tend to use car speaker cable which is fat and can insulate the 12V we need.

Of all the possible ways to lose power from a panel, this is the most significant. On a crystalline panel, even the stripe of a rope’s shadow can wipe out a huge amount of the potential output power. Why is this? The individual cells in a crystalline panel are wired in such a way that a cell which is in shadow and not producing will act as a sink for the power produced by the other cells it’s wired to, with the result that virtually no power escapes from the panels as a whole.

You must have a regulator. The job of the regulator is to throw power away. It does this to ensure the power passing on to the batteries or services is not too great for them to handle. Normally it does this by controlling the amount of power passing through it and hold the output voltage at some predetermined value such as the float charge voltage of 13.4V.

The value of the power it passes depends on the current required by the load: the sum of batteries, lights, fridge and so on that are sucking the current from the panels. If the fridge is on, for example, more power will flow through the regulator and it will throw less power away as heat.

Most common, older regulators use a pulse width modulation (PWM) system which is more efficient than simply controlling the output voltage. Maximum power point tracking (MPPT) devices provide more usable power by seeking the panel’s optimum power voltage although they are expensive.

Chief among the suppliers is Victron (avoid the so-called MPPT types from ebay, they are almost certainly not MPPT controllers). And if you have the room it might be better to spend the money on a larger boat solar panel than on an MPPT controller. This is what we’ve done on our canal boat, settling for a PWM type.

To the boat solar panel, the regulator is part of the load – a consumer of power – which is why the entry to the regulator is an appropriate place to measure the voltage and current if you want to see exactly how much is being generated by the panels.

What power do I really get from boat solar panels?

If you do the sums, the unavoidable losses on a new panel operating at 65°C (measured in full summer sunlight in Greece) are going to be in excess of 20% from the temperature increase alone. Our example 100W panel is therefore only putting out 80W, and that’s only for a few hours.

If you really need every scrap of power then you need to find a way to keep the panel cool, and you need to invest in an MPPT regulator. As the panel gets older its performance will drop off even more. All a bit depressing, isn’t it?

I have to say, though, that in our particular installation on Aderyn Glas we regularly get more than 10A from our 200W panels, and our highest recorded value was 170W, which suggests that these loss figures are conservative.

In reality, with a well set-up installation you can expect to get a maximum of 75% of the power you would expect from a continuously insolated panel operating at its rated power.

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• Digital Editions

Best boat solar panels: 6 options for boosting your yacht’s power

• Phil Sampson

We take a look at 6 of the best solar panels for boats, from folding units to cutting-edge flexible panels

Free power forever? If only it was that simple! Photo: Graham Snook

For many in the boating community, boat solar panels represent something of a holy grail. They are, after all, the gift that keeps on giving, aren’t they? Free power forever, (or many years anyway), coupled with zero running costs – what could possibly be better than that?

All you have to do to make this dream come true is banish the memory of the purchase price from your mind – something boaters are notoriously adept at doing – and wait for the sun to shine. If only it were that simple…

The fact of the matter is that there are costs associated with boat solar panels beyond the price of the panels themselves. While some types of panels can be simply laid on the deck, in many cases some form of mount will be required.

Then there’s the wiring to hook them up to your battery, plus any fitment and/or cosmetic work needed to hide the cabling from view. If your panels are to be left connected permanently, you’ll require a regulator too.

This will prevent both overcharging and a reverse flow of power out of the battery after dark. If you do not fit a regulator, a blocking diode can be used to halt the reverse flow instead.

But once all of the above have been overcome – and providing you’ve done your homework to ensure your panels will generate sufficient power to cover your needs – then, yes, it’s a power free for all!

There are many other benefits to boat solar panels too: First and foremost, they work all on their own – solar panels are automatic, so you can just let them get on with the job.

Apart from the occasional wipe over and a wiring check, they’re largely maintenance-free too. Unlike wind generators, (especially like the one with wonky bearings on that boat moored next to you), they don’t make any noise.

And finally, your battery will be pleased, because keeping it from going flat can extend its life.

Here’s our choice of the best boat solar panels.

6 of the best boat solar panels available right now

Giosolar 1,000W flexible solar panel

Best flexible boat solar panel

Delivering a mighty kilowatt of power, (not far off the amount used by a one bedroom house), this Giostar package comprises ten separate 100W panels, each of which is 1,050 x 540 x 2.5mm in size.

Capable of charging either 12 or 24V batteries, a kit of this magnitude is one for the most serious of solar enthusiasts – Eco Experts reckons 660-990W is sufficient for a liveaboard.

Giostar panels are abrasion resistant, anti-rust and dust proof and their junction boxes are sealed and waterproof. The panels are also light, thin and flexible, and can withstand being bent up to 30 degrees.

Price: £1,464.45

Buy it now on Amazon (UK)

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Mobisolar 100W foldable solar panel

Best foldable boat solar panel

Mobisolar’s foldable panels are light (4.5kg) and measure 121 x 56.5 x 3 cm when unfolded, with the longest dimension reducing to 60 cm when folded, making them easy to transport.

The panels use advanced technology to provide superior performance, with each panel subjected to a thorough testing routine before and after assembly.

So confident is Mobisolar in its products that the company stands behind its panels with a two-year defect warranty and a five years’ electrical performance warranty.

For maximum flexibility in operation, three USB power outputs are fitted per panel, one delivering 100W, the second 60W and the third 10W.

Price: £145.00

Buy it now on eBay

Eco-worthy 100W solar panel kit

With 100W panels being ideal for keeping batteries topped up, our second offering in this power class is from Eco-worthy, a major player in the solar panel field.

Competitively priced, our link below is for a kit which includes an LCD control unit and four ‘Z’ brackets in addition to the panel itself.

The Eco-worthy 100W panel is of the monocrystalline type, which means their cells are made from an ingot grown from a single silicon crystal of high purity. It’s also a rigid panel, so this particular product would need to be mounted on a frame or flat surface.

Price: £113.99

PV Logic 20W Flexi solar panel

Offered by Force 4 Chandlery, this lightweight semi-flexible solar panel comes complete with a dual battery solar charge controller.

The panel is completely waterproof thanks to its six-layer, heavy-duty laminate finish, and should a wayward crew member plod over it in their size 9s the panel’s dimpled top surface is ‘self healing’.

The controller can handle both 12 and 24V systems and the panel’s PWM (Pulse Width Modulation) charging system is efficient and battery-lifetime friendly.

Supplied with LED battery-status indicators and 4 metres of cable, PV Logic Flexi panels can be bonded to flat or curved surfaces.

Price: £149.95

Buy it now on Force 4 Chandlery

Powoxi 10W solar panel

At the budget end of the market comes this Powoxi 10W solar panel charger kit. While you won’t go far on just 10W of power, this kit claims to be capable of charging and maintaining various 12V batteries.

The kit features a fully automatic charging and maintenance controller, which provides intelligent three-level charging and protection against short- and open-circuits, under voltage and overloading.

A reverse flow system is included and the interface is described as ‘plug and play’. While the panel is rainproof, it will not withstand immersion in water, so this is a product to perhaps leave behind on the dock when you take to the water.

Price: £27.59

Eco-worthy 10W/5W solar panel

The least pricey option we could find anywhere, this baby 5W solar panel is simply a trickle charger. But if that’s all you need then look no further, for this is another Eco-worthy product.

The technology in the panel is polycrystalline, so it’s not the most efficient on the market, but for this power that’s hardly a great concern.

The panel is supplied with two charging options; a pair of crocodile clips which attach directly to the battery, and a cigarette lighter plug.

According to the product’s eBay listing, this seller alone has sold approaching 3,000 of these units – and at this price, we can understand why!

Price: £9.99

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Solar panels for boats: What you need to know

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Owning a boat can be expensive; you have to pay an upfront cost to purchase it, and you'll also have to spend money on maintenance and fuel charges. Solar panels may be the answer if you're looking for a reliable, cost-effective way to power your boat.

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How do solar panels work on boats?

Solar energy systems on boats work similarly to other portable , off-grid systems. There are four important components to a marine solar panel system:

Solar panels

Charge controller

Most marine solar panel systems require charge controllers to prevent the batteries from receiving more voltage than they can handle. Without charge controllers, you risk overcharging and damaging your battery.

Depending on your boat's electrical setup and the appliances you need to power, you may also need an inverter to convert direct current (DC) electricity into alternating current (AC) electricity. Some boat electronics use DC and don't need an inverter. However, if you use everyday household appliances on your boat (i.e., TVs, microwaves, or hairdryers), they likely run on AC electricity, and you'll need an inverter.

You can buy all of these components separately, but you can find solar panel kits that include some or all of the necessary parts. Some marine solar panel kits include the wires, cables, and mounting equipment required to get your boat's solar panel system up and running.

Best solar panel kits for boats

Below are a few products tailored to off-grid marine solar power systems.

Boat solar panel options

If your solar panel kit does not include an inverter or charge controller, you must buy those components separately. Battery storage products occasionally have built-in inverters and/or charge controllers.

Should you install solar panels on your boat?

There are numerous benefits to powering your boat with solar energy. One of the most attractive benefits of marine solar power systems is the monetary savings. You'll need to invest money upfront to purchase solar equipment; however, once it's up and running, you'll generate free electricity for your boat. Alternatives to electrifying your boat, like gasoline-powered generators, require purchasing fuel on an ongoing basis. Switching to solar power can reduce these purchases while protecting you against rising fuel costs.

Another benefit of marine solar panel systems is the quietness of operation. Running a generator can be a noisy disturbance for those going out on the open water to experience nature. Powering your boat with solar allows you to enjoy peace and quiet without losing power.

Furthermore, you can also safely generate electricity and charge your battery with solar power while you're away from your boat. This isn't feasible with generators - running a generator requires manual operation and monitoring. With solar panels, you can produce usable electricity during the day and then use it for weekend boating adventures.

However, there can be obstacles to installing solar on a boat, perhaps the largest of which is available space. Ideally, your solar panels can be installed in an area with uninterrupted sunshine. Depending on your boat type, this space may be easy or difficult to come by. While you likely get a lot of sun out on the water, the area may be too small or have too many obstacles that make fitting the number of solar panels necessary to generate your electricity needs difficult.

Consider your boat's deck or canvas when you're looking for spots to install a marine solar panel system. Remember that the positioning of your solar panels will also impact the type of equipment you should purchase – you may be able to use traditional monocrystalline and polycrystalline solar panels if you're installing on a fixed, rigid section of your boat. However, if your only open space available isn't suitable for fixed mounting, installing lower-efficiency flexible solar panels may be a better option. Some flexible solar options have an adhesive backing, so you won't need to worry about the constraints of traditional mounting and racking materials.

How many solar panels do you need for your boat?

Unsurprisingly, a yacht has very different power requirements than a sailboat. The number of solar panels you'll need for your boat not only depends on the type and size of your boat, but also the quality of the equipment you choose, how many sun-hours the boat sees, and the amount of electricity you require. Some boats can get by with one 100-watt solar panel (or even smaller), while others need a multi-panel setup.

Calculating your electricity load is the first step in determining how many solar panels you need. Below are some common appliances you may use on your boat and what they draw for power.

How many solar panels do you need for common appliances?

The last column of the above table is the amount of energy you'll consume in watt-hours running each appliance for the number of hours identified in column three. One 100-watt solar panel that receives direct sunlight for 5 hours will produce approximately 500 Wh of electricity (5 hours x 100 W = 500 Wh). Not considering conversion losses, that's enough electricity to power a mini-fridge for 24 hours or power a boat's GPS display for 10 hours. Running all of the appliances above for everyday use will require multiple 100-watt solar panels or fewer higher-wattage panels.

Install solar to save on electric bills

You can save money by installing a marine solar panel system, but you'll save even more by installing solar on your home or business. If you want to evaluate your solar options, check out the EnergySage Solar Marketplace . You can receive up to seven custom solar quotes from local installers to compare. You can also try our solar calculator for a quick estimate of solar costs and savings on your property.

Create your own clean energy with solar panels.

Enjoy the benefits of solar without rooftop panels.

Explore heat pumps, the latest in clean heating & cooling technology.

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Enter your zip code to find out what typical solar installations cost in your neighborhood.

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Solar Express: The 130m concept with 1,500sqm of solar panels

Related articles.

Design studio M51 has unveiled a 130 metre superyacht concept that is covered in over 1,500 square metres of solar panels.

Aptly named Solar Express, the concept’s exterior is characterised by the huge “narwhal-tusk” inspired spike at its bow.

Anthony Glasson, the designer behind the concept, said: “Taking inspiration from steam trains, Solar Express is an attempt at a greener future for large superyachts.”

The concept’s foredeck, sundeck and stern are covered in solar panels which combine with storage batteries and generators to power the yacht’s onboard electrical systems.

Solar Express’s lightweight aluminium hull, combined with lightweight materials throughout the vessel, reduce the weight and allow for greater battery capacity. A hybrid propulsion system comprising twin Azipods and electric generators also helps keep emissions down.

According to Glasson, the concept’s 5,260GT is a relatively small volume for a 130 metre yacht, resulting in more room for solar panels and smaller interior areas to keep air-conditioned.

In order to pen the eco-focused concept, Glasson admits some sacrifices were made during the design process. “This concept is for the owner who does not mind forgoing some typical large superyacht features such as helipads or sundecks to make way for solar panelling.”

Solar Express nonetheless still offers a range of typical luxury yacht amenities including a 10 metre long swimming pool, a hot tub and al fresco dining on the main deck.

Accommodation is found on the upper deck, with two VIP cabins overlooking the aft deck and provided with expansive ocean views.

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Solar Powered Yachts

Solar panels are a fundamental element of today’s quest for responsible energy generation. Used in households, commercial facilities, and power stations across the globe, they are also a vital source of energy for solar powered yachts. With significant progress made over the last years, photovoltaic technology has emerged as the natural energy source with the most exciting growth potential.

Thanks to photovoltaic cells, solar panels absorb sun radiation to generate direct current (DC). When sunlight reaches a solar cell, it causes silicon electrons to move. This motion will start the flow of electricity that is captured by wires and directed to an inverter. Inverter technology is then used to convert it to alternating current (AC) ready to power household appliances.

The solar power systems on solar powered yachts usually consist of solar panels, batteries, charge controllers and inverters. While batteries store the energy obtained from the solar panels, charge controllers prevent batteries from overcharging. Solar catamarans with house appliances on board will usually need to convert the DC energy into AC with the help of an inverter.

Sunreef Yachts produces solar panels in-house and uses a new (patent-pending) technology to integrate them within structural components. The panels are made of the industry’s most efficient cells with a peak performance of 24%.

Thanks to the solar cells’ outstanding flexibility, Sunreef Yachts’ solar panels can be mounted on any surface of the solar powered yacht. As a result, they are integrated with various areas on board, such as hull sides, mast, superstructure, bimini roof or bow terrace to maximize energy generation.

With a thickness below 1mm and weighing around 1,8 kg per square meter (average solar panels will weigh between 8 and 15 kg per square meter), they are one of the lightest solar power systems in the world. In addition, tests have proven that thanks to their advanced integration technique, Sunreef Yachts solar panels have a very high resistance to shock and abrasion. This allows them to be used on any surface, including hull sides.

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Solar Power for Boats

• 30 Years Experience
• Applications
• Types of Solar Panel for Boats

Surface Mounted Solar Panels

Gantry mounted solar panels, 30 years of experience.

As a distributor of marine solar panels Marlec has advised and supported the British Marine Federation for many years in matters of solar power for boats. In collaboration with the World Cruising Club our knowledge and understanding of ARC participant s needs are well understood. You can purchase marine solar panels directly from us and build up your own solar power system, or speak to our team of wind and solar experts about planning your energy needs for your trip to ensure your power system reliability. For over 30 years Marlec has been providing wind and solar power for boats putting us in a unique position to advise and supply you with a suitable solution.

View our Introduction to Solar & Wind Energy for your boat:  https://youtu.be/IfWAiYWKU6k

View our Introduction to Solar Energy & Solar Panels for your boat:  https://youtu.be/xcf8J4LM_rk

Types of Solar Power for Boats

It is important to use marine solar panels to ensure that you have a system designed to withstand the harsh conditions at sea. Flexible solar panels can be used to create a flush finish and can even be walked on, or solid framed glass panels can be used for a higher power density and for extra mounting options.

• 10W – 200W Power Rating
• Semi-Flexible
• Surface Mounting
• Standard and Pro Modes Available
• A Mono Crystalline Solar Cells (Standard)
• SunPower Cells (Pro Models)
• Ultra-Lightweight
• 3m Twin Core Cable Included
• Blocking diode included

Spectra PERC-S

• 30W-400W Power Rating
• Glass Frames
• Identical Frame Lengths for Combing Different Ratings.
• Uses PERC Technology
• Shingled Cell Module Design
• By-pass Diode configuration to avoid ‘hot spots’.

• 24-69W Power Rating
•  Semi-Flexible
•  Surface Mounting
• Marine Grade Stainless Steel
• EVA Surface
• Teflon Coated Surface
• 3m Seawater Sealed Cable Included
•  Blocking diode Included

• 10-140W Power Rating
• Framed (Not Flexible)
• Gantry/Bracket for Mounting
• Silver Anodised Aluminium Frame
• Transmissive Toughened Glass

• 10-135W Power Rating
• Framed (Not Flexible)

To be laid or fixed to a surface/deck.

• Ideal for when deck space is at a premium
• When used on a temporary basis can be moved into the sun and away from shade
• Lightweight and flexible
• Can be walked on in boating shoes
• Simple to remove and store

Solid framed modules to be mounted using mounting kits or by other means.

• Solid mount above deck reduces shading from overhead objects
• Allows for larger arrays and therefore greater power consumption

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Solar Panel Installation Companies in Elektrostal'

Location (1).

• Use My Current Location

Popular Locations

• Albuquerque
• Cedar Rapids
• Grand Rapids
• Indianapolis
• Jacksonville
• Kansas City
• Little Rock
• Los Angeles
• Minneapolis
• New Orleans
• Oklahoma City
• Orange County
• Philadelphia
• Portland Maine
• Salt Lake City
• San Francisco
• San Luis Obispo
• Santa Barbara
• Washington D.C.
• Elektrostal', Moscow Oblast, Russia

Professional Category (1)

• Accessory Dwelling Units (ADU)

Project Type

• Solar Panel Installation
• Solar Water Heating
• Home Energy Audit
• Solar Tube Installation

• Reach out to the pro(s) you want, then share your vision to get the ball rolling.
• Request and compare quotes, then hire the Solar Energy Systems professional that perfectly fits your project and budget limits.
• Solar Pool Heating
• Solar Panel Cleaning
• Solar Panel Repair

For large solar projects in Elektrostal', it is recommended to contact a local solar company that can handle the installation and maintenance of the solar panels. Local solar companies are well-versed with regional regulations and climate conditions, ensuring a smooth and efficient process.

For smaller projects, you have several options to buy solar panels:

• Purchase solar panels through certified solar companies that have deals from top manufacturers.
• Buy DIY kits available at home electronics online stores.
• Get solar panels directly from the manufacturers themselves.

Before making a decision, consider factors such as technology compatibility, features, and the expertise of installers. Researching different brands and dealers can help you make an informed choice for your solar panel purchase.

Here are questions you can ask solar contractors in Elektrostal':

• What types of solar panels do you offer, and do you have experience in installing solar equipment?
• Can you provide estimates for the number of solar panels needed, the overall costs, and the payback period?
• Are you properly licensed, insured, and do you have experienced in-house installers?
• Where do your solar products come from, and are they sourced from reputable suppliers?
• Which solar panel system is suitable for my needs - grid-tied or grid-tied with energy storage?
• What is your company’s track record, and do your technicians hold relevant certifications?
• What are the benefits of going solar, and is my roof suitable for solar panels in terms of sunlight exposure and available space?

Asking these questions will help you gather important information and choose the right solar company for your specific requirements.

Questions to ask potential solar panel companies:

Business services, connect with us.

6 Best RV Solar Panels and Kits

Best expandable solar rv kit.

Renogy 100-watt solar kit + 30-amp charge controller + cables

If running a solar system to power electrical items in your RV is new to you, and you want to try it on a small scale, this 12-volt kit is ideal. The Renogy name has a superb track record in the field, and this kit comes with an oversized 30-amp charge controller. A charge controller is essential with every photovoltaic system that uses batteries. It governs the amount of power going to the battery so it lasts as long as possible.

With this kit, all you need to do is add a battery to enjoy DC power without firing up a generator. Add an inverter to the system if you need AC power to run small appliances and charging equipment. At 100 watts of peak output, this solar kit can recharge a 100-amp-hour battery from 50 percent discharged to 100 percent in six to eight hours. Not crazy-fast, but you can add additional panels later if you want a faster charge time. The basic 30-amp charge controller that comes with this kit offers room to expand your system. It can safely handle an additional 260 watts of solar panel output.

Best Basic Solar RV Kit

XINPUGUANG 200 watt kit + 20 amp charge controller + cables

In addition to offering energy output that’s more than adequate for a small RV system, the solar panels in this 12-volt kit are physically flexible enough to conform to the curved roof of an RV for mounting. Each kit also comes with cables to connect the photovoltaic panels to the basic 20-amp charge controller, plus other cables to connect the charge controller and the battery. Although adequate, the charge controller that comes as part of the kit offers no capacity for additional photovoltaic panels if you want to add any for faster recharging times.

Best Large, Complete Solar RV Kit

WindyNation 400 watt + 30 amp charge controller + 1500 watt inverter + AGM battery + cables

This is a big, complete, 12-volt RV solar power kit that includes everything you need to get up and running. WindyNation has a long track record in the off-grid energy world, and this kit comes with four 100-watt photovoltaic panels.

The 1,500-watt inverter that’s also part of the kit is large enough to provide 120 volts of AC power for fairly high-draw items such as an electric kettle, a microwave or a clothes iron. If you want more peak power than this you’ll need a larger inverter. Although the charge controller that comes with this system has no excess capacity to accommodate additional panels, the 400 watts of peak solar power is large enough to satisfy most RVers.

Best Small Solar RV Kit

ECO-WORTHY 200 watt + 1000 watt pure sine wave inverter+ 20 amp charge controller + cables

This kit includes everything you need to generate 12-volt DC and 120-volt AC power. Just add one or more batteries to the system and you’re ready to go. Although the inverter can only put out a maximum of 1,000 watts of AC power, the pure sine wave power output is clean and suitable for safely powering the most sensitive electronics.

(“Pure sine wave power output” refers to the quality and cleanliness of electrical output. Modified sine wave inverters cost less but can’t be used to power electronics.)

RV owners install systems like this to handle small electrical loads such as lighting, charging and small-scale cooling, leaving the big power demands to a gas-powered generator . The non-flexible solar panels come with mounting clips. And the charge controller has a particularly easy-to-read screen so you can easily monitor battery voltage and charge state.

Best Micro Solar RV Kit

ACOPOWER 50 watt panel + 5 amp charge controller + cables

This economical, compact kit has a great track record in the field. It’s made for people who want solar power only for small-draw applications such as charging phones and energizing a few LED lights. If you’ve already got decent generator support for your RV and just want something to provide basic power that’s silent and fume-free, this kit is worth a look.

The panel itself weighs only 10 pounds and measures a compact 26-1/2 in. x 21-3/4 in. x 1-1/2 in. Although you’ll need to buy and connect an inverter to your battery to get 120-volt AC power output, the charge controller itself has a USB port for direct charging of phones, lithium booster batteries and anything else that uses a USB cable.

Best Flexible Panel Solar RV Kit

Giosolar 200 watt kit + 20 amp charge controller + cables

This kit includes physically flexible solar panels that can be mounted on the curved roof of any RV. In addition to what’s included with the kit, you’ll need to add a battery to make this a functional system that delivers DC power. If you also want 120-volt AC power, you’ll need an inverter in your setup.

Any solar panel will only deliver its rated wattage output under ideal conditions, so gauge your expectations accordingly. The 200-watt panels in this kit can recharge a 200-amp-hour battery bank from 50% to 100% during a typical day of RV driving in sunny conditions. For what it’s worth, the Giosolar panels also come with a 25-year output warranty.

How many solar panels do I need to fully power my RV?

The amount or size of solar panels you need to power your RV depends on how much you are powering within your vehicle. If you’re looking to power a small fridge along with a few other small appliances, 100 watts will suffice. If your RV has a large fridge, air conditioning, an electric stove and other large appliances, you may need closer to 500 watts of solar power.

We recommend starting with the Renogy solar kit mentioned above. It will allow you to gauge how much energy you need to run your RV and add more panels if needed. Also,  take into account how much sun your solar panels will be exposed to. Thoroughly read product descriptions to help you find the most efficient option.

Should I use mounted or portable RV panels on my RV?

Think about how much energy you’re looking to source from solar, how often and where you travel and the size or shape of your RV when considering purchasing mounted or portable solar panels. Mounted RV panels typically come with equipment to permanently install them on the roof of your RV. They are more durable and made to withstand the elements since they will be outside all season. Portable RV panels fold up for easy storage and are built to be taken down and set up again at each new site you travel to. They can withstand light wind and rain but are not built to be set up outside permanently.

What other equipment will I need to use solar panels on my RV?

Depending on the kit you buy, you may also need to purchase a battery for energy storage, an inverter, a charge controller to help the battery last longer and a battery monitor to alert you when the charge is low. Thoroughly read the product description of the solar panel you’re looking to purchase before getting any of these additional pieces of equipment. Many times these items are included in the kit with the panels.

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• Patio, Lawn & Garden
• Generators & Portable Power
• Solar & Wind Power
• Solar Panels

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• No Additional Cost: You pay nothing for repairs – parts, labor, and shipping included.
• Coverage: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
• Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.
• Product Eligibility: Plan must be purchased with a product or within 30 days of the product purchase. Pre-existing conditions are not covered.
• Terms & Details: More information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Terms & Conditions will be available in Your Orders on Amazon. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase.

3 Year Home Improvement Protection Plan

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1200 Watt Solar Panel Kit, with 40A Charge Controller 2 × 600 Watt Flexible Monocrystalline Solar Panel for 12-24V Battery Charging Car Battery Camper RV Yacht Battery Boat

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About this item.

• ★[Excellent performance] Using high-quality monocrystalline silicon cells, covered by high reflection rate ETFE layer, High efficiency, conversion rate 21-23%，High conversion for continuous power supply as long as there has sun.high-efficiency monocrystalline silicon solar cells provide good performance even in low light conditions
• ★[Highly durable] The solar modules can withstand high wind-pressure, snow loads and extreme temperatures.Flexible Solar Panels board that can be bent up to 30 degrees
• ★[Flexible] This flexible solar panel is a good choice for curved surfaces of RV, boat,sailboat, yacht,truck, car, coach, cabin, camper , tent , trailer, golf cart or any other irregular surface.
• ★[Reliable] Advanced encapsulation material with multi-layered sheet laminations to enhance cell performance and provide a long service life.Design with 6 holes on panel, can be fix on different kinds of surface, better compatibility.
• ★[Function] Solar panels can convert light energy into electrical energy to generate a voltage of 24V, which can effectively cope with the problems caused by power shortages and power outages. It is a good choice to use solar panels in places where there is no electricity or where city electricity cannot be reached.

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