Premium Trailer Solar Panels
Designed specifically for trailers
We provide all sizes of rigid, semi-rigid (walk on) and flexible marine grade solar panels for trailers. On a trailer roof space is at a premium and shading is often an issue. Our panels are specially designed to work well when partially shaded (diodes, Sunpower, PERC, HJT cells). They are also built with the highest grade solar cells available (22-24.4% efficient) to produce maximum power per square inch. They are ideal for use on trailers (lightweight, low profile, robust, highest efficiency).
The semi-rigid walk on panels are very popular for trailers. You can load gear on top of them, sit on them, dance on them. We recommend white background for better performance as solar performance degrades with heat, white background stays cooler than black. On that note, flexibles dissipate heat better than semi-rigids, if possible flexible solar panels are best for trailer roofs (lighter weight, lower profile, better heat dissipation), though walking on them is not recommended.
The semi-rigid walk on panels are very popular for trailers. You can load gear on top of them, sit on them, dance on them. We recommend white background for better performance as solar performance degrades with heat, white background stays cooler than black. On that note, flexibles dissipate heat better than semi-rigids, if possible flexible solar panels are best for trailer roofs (lighter weight, lower profile, better heat dissipation), though walking on them is not recommended.
Sprinter van with 150 watt walk on panels
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Sprinter van 3 CMP walk on 60 watt PERCs and 1 150 watt walk on PERC solar panel
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For pricing/purchase/info: Walk-on van solar panels - Flexible van panels - Rigid van solar panels - Portable solar kits
High Performance Trailer Solar Panels Specification Summary
Walk on panels in BLUE
The key to a high performance, high quality solar panel that will last is the quality of the solar cells used in the panel. We use the highest efficiency grade A+ solar cells. Our panels are built with premium SunPower monocrystalline back contact, PERC, and HJT high efficiency solar cells. Our solar panels have essential blocking and bypass diodes built in (to prevent power from flowing into shaded panels or from batteries into solar panels at night), and potted (filled with silicone) junction boxes to protect the electronics from environmental damage. Our rigid solar panels have strong anodized aluminum frames and marine grade sealants. Our semi-flexible and semi-rigid solar panels average the same output per area as our rigid panels and are constructed with high quality ETFE laminates that won't deteriorate (turn milky) or delaminate from intense heat and UV exposure. That is why we are comfortable offering a 1 year warranty on all of our semi-flexible panels, a 3 year warranty on our semi-rigid panels and a 5 year warranty on our rigid panels.
A Few Facts About Marine Grade Solar Panels
Panel Type - There are many articles written on the two types of solar panels also referred to as photovoltaic panels (PV) ; monocrystalline and polycrystalline. Monocrystalline panels are made up of single crystal silicon wafers. Polycrystalline panels are made using silicon wafers that have a multiple crystalline structure. There are pros and cons to each type of panel. Monocrystalline panels have a higher output per square inch in direct sun. They can be sensitive to shading and output may degrade faster on cloudy days. Polycrystalline panels tend to have a lower output per square inch in direct sun but are not as sensitive to being shaded. It is important to note that today's newer high quality polycrystalline panels perform within 5% of monocrystalline panels in full sun. The premium monocrystalline SunPower cells used in our marine solar panels provide the best all around performance of any solar cells on the market.
Panel Solar Cell Quality - Because vans have a relatively small available space for solar, maximum power output per surface area is very important. The quality of the solar cells used in solar panels is a key factor in determining the panel output. Solar cells are passed under a standard light source and graded as to their output (1-10). Grades are grouped into classes. Class A (and A+) solar cells are grades 8-10, Class B solar cells are grades 4-7 and so on. Solar cell quality follows a bell curve; there are many more Class B solar cells than Class A. We at CMP specify only the best Class A-9 (A+) solar cells for use in our panels which results in a panel efficiency of 16-24%. Less expensive Class B and C panels are often used on land based solar farms where space is not an issue. Though a bit more expensive, our customers have reported that our solar panels often outperform the performance rating on the panel label.
Panel Solar Cell Quality - Because vans have a relatively small available space for solar, maximum power output per surface area is very important. The quality of the solar cells used in solar panels is a key factor in determining the panel output. Solar cells are passed under a standard light source and graded as to their output (1-10). Grades are grouped into classes. Class A (and A+) solar cells are grades 8-10, Class B solar cells are grades 4-7 and so on. Solar cell quality follows a bell curve; there are many more Class B solar cells than Class A. We at CMP specify only the best Class A-9 (A+) solar cells for use in our panels which results in a panel efficiency of 16-24%. Less expensive Class B and C panels are often used on land based solar farms where space is not an issue. Though a bit more expensive, our customers have reported that our solar panels often outperform the performance rating on the panel label.
Average 5 Sun Hours in a Day
The Importance of Solar Cell Quality - Not All 100 Watt Solar Panels Are Created Equal -
High quality high performance solar cells will produce more power at various sun angles than lower quality solar cells; up to 30% more power. An important consideration in determining how much solar power you need is how many watt hours or amp hours of power you can expect to generate in a 24 hour period. Let's say you camp in an area that receives an average of 5 hours of full sun a day. The average is computed based on the seasonal sun angle and the sun angle from morning through evening. A 100 watt solar panel with average efficiency solar cells may produce 100 watts x 5 hours or 500 watt hours of power in a day. At 13 volts that's about 38 amp hours in a day. A 100 watt panel with high efficiency solar cells will produce up to 30% more power in a 24 hour period or 100 watts x 6.5 effective hours or 650 watt hours of power in a day. At 13 volts, that's about 50 amp hours in a day. 38 amp hours vs. 50 amp hours in a day is significant in a van. Add more panels in the mix, say 400 watts and we see 152 amp hours vs.200 amp hours, a difference of 48 amp hours. This simple analysis does not take into consideration the impact of clouds or shading both of which will make the disparity even greater. Clearly, the higher the quality of the solar cells the more power produced over time.
Panel Shape - The largest market for solar panels is commercial applications where many many panels are mounted on a roof or in a field. These panels are usually rectangular in shape often twice as long as wide. This shape is often not ideal for marine application. Often a more square shape is preferable, especially for pole mounting.
Marine Grade - It's no secret that the marine environment, especially salt water, can be tough on equipment. To withstand the rigors of the marine environment, solar panels should have strong stout anodized aluminum framing, should be well sealed and waterproof, and have the electrical box on the back of the panel encased in an inert non-corrosive waterproof material (like silicone) to protect the electronic components.
Quality marine grade solar panels are designed with bypass diodes to significantly reduce the impact of shading that so often occurs when camping and boating.
Choosing the right panel for your needs will require study and/or discussion with PV panel experts. Our staff at Custom Marine Products are ready to help you design the best solar system for your marine needs. Contact us via email or phone for a free consultation.
High quality high performance solar cells will produce more power at various sun angles than lower quality solar cells; up to 30% more power. An important consideration in determining how much solar power you need is how many watt hours or amp hours of power you can expect to generate in a 24 hour period. Let's say you camp in an area that receives an average of 5 hours of full sun a day. The average is computed based on the seasonal sun angle and the sun angle from morning through evening. A 100 watt solar panel with average efficiency solar cells may produce 100 watts x 5 hours or 500 watt hours of power in a day. At 13 volts that's about 38 amp hours in a day. A 100 watt panel with high efficiency solar cells will produce up to 30% more power in a 24 hour period or 100 watts x 6.5 effective hours or 650 watt hours of power in a day. At 13 volts, that's about 50 amp hours in a day. 38 amp hours vs. 50 amp hours in a day is significant in a van. Add more panels in the mix, say 400 watts and we see 152 amp hours vs.200 amp hours, a difference of 48 amp hours. This simple analysis does not take into consideration the impact of clouds or shading both of which will make the disparity even greater. Clearly, the higher the quality of the solar cells the more power produced over time.
Panel Shape - The largest market for solar panels is commercial applications where many many panels are mounted on a roof or in a field. These panels are usually rectangular in shape often twice as long as wide. This shape is often not ideal for marine application. Often a more square shape is preferable, especially for pole mounting.
Marine Grade - It's no secret that the marine environment, especially salt water, can be tough on equipment. To withstand the rigors of the marine environment, solar panels should have strong stout anodized aluminum framing, should be well sealed and waterproof, and have the electrical box on the back of the panel encased in an inert non-corrosive waterproof material (like silicone) to protect the electronic components.
Quality marine grade solar panels are designed with bypass diodes to significantly reduce the impact of shading that so often occurs when camping and boating.
Choosing the right panel for your needs will require study and/or discussion with PV panel experts. Our staff at Custom Marine Products are ready to help you design the best solar system for your marine needs. Contact us via email or phone for a free consultation.
Solar Tax Incentive - As long as there is a head, galley, and at least a bunk onboard and your van is used in the United States, your van may qualify. This Federal tax credit is a 30% credit on all qualified expenses to purchase and install solar panels and a solar system (including any installation charges), with no maximum limit for equipment placed in service after 2008. Plus you may have tax credits in your state.
How much solar power do you need on your van?
The amount of power needed while camping depends on many factors including the energy used by appliances and lighting, the output of the engine alternator, the climate and the length of time away from shore power. These and other factors will determine the amount of solar power and thus size of the solar panel(s) you may need for your van.
Check out our seminar slides titled Selecting the Proper Solar System and our tutorial titled A Cruiser's Guide to Selecting and Sizing a Solar Charging System under our SUPPORT section. Our engineers have developed several worksheets to assist you in analyzing your on board power generation and consumption and estimating your solar power requirement. Copy or print out our Solar Power Calculation Worksheet and use it as a guide to calculate your power generation requirement. Several other worksheets can be downloaded in our Manuals and Info section, 3rd ones from the top.
Check out our seminar slides titled Selecting the Proper Solar System and our tutorial titled A Cruiser's Guide to Selecting and Sizing a Solar Charging System under our SUPPORT section. Our engineers have developed several worksheets to assist you in analyzing your on board power generation and consumption and estimating your solar power requirement. Copy or print out our Solar Power Calculation Worksheet and use it as a guide to calculate your power generation requirement. Several other worksheets can be downloaded in our Manuals and Info section, 3rd ones from the top.
Easy to Assemble (Marine Grade) Solar System Kits
We have developed easy to assemble kits for semi-flexible panel van roof mounting, generally we recommend heavy duty automotive double sided tape. Each kit contains everything you need to install a solar system on your van (except the tape).
Properly matching solar panels to charge controllers can greatly increase the system charging efficiency, reducing battery charge time and increasing battery life. Our complete solar panel kits provide everything you need to install and operate a solar system on your van; solar panel, hardware, Solar Controller, solar wire, MC4 connectors and instruction manual. Contact us for help in designing a custom kit specific to your needs.
Properly matching solar panels to charge controllers can greatly increase the system charging efficiency, reducing battery charge time and increasing battery life. Our complete solar panel kits provide everything you need to install and operate a solar system on your van; solar panel, hardware, Solar Controller, solar wire, MC4 connectors and instruction manual. Contact us for help in designing a custom kit specific to your needs.
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Semi-Flexible Marine Solar Panels with SunPower Solar Cells |
Our SunPower monocrystalline cell flexible 55 - 145 watt high efficiency solar panels are manufactured to our specifications by highly acclaimed solar panel manufacturers. We have PERC cell panels as well for ~25% less cost, 1.5% less efficiency.
Unique features of our semi-flexible marine grade panels include the following:
Unique features of our semi-flexible marine grade panels include the following:
- Quality materials - We use impermeable ETFE laminates that will not cloud of degrade with exposure to intense UV light.
- Grade A+ SunPower solar cells - The panels are comparable in performance to our rigid panels.
- Mounting flexibility - Flexible panels will contour and flex against curved surfaces with a maximum bending radius of 30 degrees, ideal for mounting on a van roof, low profile/windage, low weight.
- Mounting options - Each panel can be affixed by high bond tape, snap, magnetic or screw mounting. Grommets are an added bonus for ease-of-installation.
- Plug and play - All flexible panels come with industry standard waterproof MC4 connectors on 3 foot (1 meter) long pigtails.
- Maximum output with shading - The panels are equipped with blocking and by-pass diodes so a shaded panel has minimal effect on the solar array performance.
- Purchase options - These panels can be purchased individually or as a complete easy to install kit.
- Durable - Although not recommended, the panels can be lightly stepped on if properly mounted.
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Semi-Rigid Marine Grade Walk On Solar Panels with SunPower Cells |
CMP has just released a new series of semi-rigid walk on marine solar panels. With a strong aluminum backing and very thick ETFE laminate non skid surface, these panels can be walked on and can conform to a slightly curved surface (5 degrees). These panels are ideal for mounting on a van roof as you can walk on them or sit on them (watch wildlife or car races or sunsets) without fear of damaging them. They are also super robust should anything fall on them or hit them. Many customer mount the walk on panels in their roof racks, they are plenty robust to have gear piled on top of them. We use premium SunPower Gen III solar cells with an efficiency rating of up to 23.7%, the highest efficiency available anywhere. There is no glass and no aluminum frame so these panels are considerably lighter than our rigid panels but heavier and stiffer than our semi-flexible panel series. The expected life of these panels is 15 years in the harsh marine environment. The panels are available with a white or black backing. They are available in 110,120, 150 and 175 watt power output. Also as PERC cells, similar efficiency but ~25% less cost.
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Rigid Marine Grade PV Solar Panels with SunPower Cells |
The ideal van solar panel must be highly efficient (maximum output per surface area) and robust enough to withstand the harsh marine environment. We offer various sizes and types of solar panels to meet the unique needs of our camper van customers. For the live-in van with modest power requirements, we recommend our 110 - 140 watt panels and for the van with greater power requirements we recommend our 140 - 200 watt panels.
All CMP (Custom Marine Products) solar panels are high quality, high output Class A+ marine grade and backed with a 5 year manufacturers and CMP warranty.
All CMP (Custom Marine Products) solar panels are high quality, high output Class A+ marine grade and backed with a 5 year manufacturers and CMP warranty.
Our rigid glass monocrystalline solar panels using premium SunPower solar cells are some of the most efficient panels available at over 23% efficiency. These marine grade solar panels will perform extremely well in both full and partial sun. They are built to withstand the harsh marine environment. When integrated with our Tracer BN or Xtra-N MPPT controller, this combination provides the highest output per sq. inch of any most system available.
What are the best van solar panels?
The best van solar panels have five essential components:
1. Sunpower cells - even if a cell is partially shaded they still produce power. Sunpower's A+ grade cells (Maxxeon) are among the best available putting out up to 23.7% efficiency.
2. Potted (silicone filled) junction boxes - so saltwater cannot corrode the electronics.
3. Easily mountable, either semi-flexible or rigid panels with stout anodized aluminum framing, depending on the application.
4. A+ grade solar cell quality. Cheaper panels will have lower quality, less efficient cells. Space is always at a premium in marine applications so the highest efficiency cells available are imperative. Highly efficient cells produce considerably more power at lower sun angles than lower grade cells.
5. Have bypass diodes to significantly reduce the impact of shading that often occurs when camping.
Are there van solar panels for roof mounting?
Yes for sure, there is a company that coats panels in about a quarter inch of EFTE laminate to protect the cells, Custom Marine Products. This is thick coating is necessary because regular flexible panels get micro cracks in the cells when you walk on them which severely degrades their performance. Many van solar panel providers claim you can walk on their flexible panels - which is true if you don't mind wrecking your performance. These walk on panels are a good solution all around because they are not damaged by hail as flexible panels can be. They are very robust and can be mounted with glue, double sided tape, or screwed on.
What is the difference between a cheap van solar panel and an expensive van solar panel?
High quality high performance solar cells will produce more power at various sun angles than lower quality solar cells; up to 30% more power. An important consideration in determining how much solar power you need is how many watt hours or amp hours of power you can expect to generate in a 24 hour period. Let's say you travel in an area that receives an average of 5 hours of full sun a day. The average is computed based on the seasonal sun angle and the sun angle from morning through evening. A 100 watt solar panel with average efficiency solar cells may produce 100 watts x 5 hours or 500 watt hours of power in a day. At 13 volts that's about 38 amp hours in a day. A 100 watt panel with high efficiency solar cells will produce up to 30% more power in a day or 100 watts x 6.5 effective hours or 650 watt hours of power in a day. At 13 volts, that's about 50 amp hours in a day. 38 amp hours vs. 50 amp hours in a day is significant in a van. Add more panels in the mix, say 400 watts and we see 152 amp hours vs.200 amp hours, a difference of 48 amp hours. This simple analysis does not take into consideration the impact of clouds or shading both of which will make the disparity even greater. Clearly, the higher the quality of the solar cells the more power produced over time.
How much solar power do I need on my van?
It depends on how much power your van uses and what you are trying to accomplish. Running a radio for an afternoon will use considerably less power than a refrigerator, lights, water pump, and a computer while living in a van. Sizing your solar system is not an exact science and it may be best to leave space on your solar controller to size up as needed. As they say, you can never have too much power! An abundance of power is much more fun than a deficit. We have a google docs sheet available for edit to help you figure out the power you need, see it here: https://docs.google.com/spreadsheets/d/1CnNTXkCZ6kqdcLZ_kXOVL3F_L_zgdWxvnv8pe7XjC8A/edit?usp=sharing Of course feel free to call us any time to discuss your needs, we've built hundreds of solar systems and are happy to share our knowledge.
Can I power my refrigerator with a 120 watt panel?
Most likely yes. It will depend on the battery bank you have to run it when the sun isn't shining. Refrigerators in vans are one of the most frequent uses for solar power. Here is a google docs sheet available to help you figure out the power you need for your van: https://docs.google.com/spreadsheets/d/1CnNTXkCZ6kqdcLZ_kXOVL3F_L_zgdWxvnv8pe7XjC8A/edit?usp=sharing Generally a refrigerator in a van draws 5 amps.
Call us any time for help with your van's solar panels or solar system, we're happy to talk you through the design of your custom solar system. We specialize in van solar and all types of van solar panels and systems. We pride ourselves on our service both before and after you purchase.