70 Watt Flexible Marine Solar Panel - New Generation Back Contact Cell A+ Grade 27.4% Efficient Cells
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More solar power in less space.
The CMPower 70 Watt New Generation Semi-Flexible Solar Panel features 27.4% high-efficiency All-Back Contact (ABC) solar cells designed to maximize sunlight energy absorption across the front of the panel. With a lightweight 0.9 kg construction, slim 3 mm profile, and semi-flexible design, it is ideal for curved and weight-sensitive installations where conventional rigid panels are not practical.
Designed for boats, bimini tops, decks, vans, racks, rooftops, and other space-constrained applications, this next-generation panel delivers high power output from a compact footprint.
Why Choose the CMPower 70W Back Contact Panel?
- 27.4% high-efficiency Back Contact cells for high solar output from a compact panel
- All-Back Contact (ABC) technology places electrical contacts on the rear of the cells, maximizing the front surface available for sunlight energy absorption
- Enhanced shade tolerance through advanced cell and electrical design
- Excellent high-temperature performance with a -0.26%/°C temperature coefficient
- Lightweight semi-flexible construction at just 0.9 kg
- Slim 3 mm profile for low-profile installations
- 60° maximum bend angle for installation on suitable curved surfaces
- Clean all-black, grid-free appearance for a sleek finished look
- Marine-ready waterproof IP67 junction box
- 316 stainless steel holes and eyelets for durable mounting
Specifications
| 70 Watt Flexible Marine Solar Panel - Back Contact 27.4% Efficient Cells | |
|---|---|
| Model | CMP23055FB-70-ST |
| Rated Power | 70 Watts |
| Peak Power Voltage (Vmpp) | 20.8 Volts |
| Peak Power Amps (Impp) | 3.4 Amps |
| Open Circuit Voltage (Voc) | 24.3 Volts |
| Short Circuit Current (Isc) | 3.6 Amps |
| Cell Conversion Efficiency | 27.4% |
| Solar Cell Type | Back Contact Cells |
| Dimensions | 21.26" x 22.4", 540 x 570 x 3 mm |
| Weight | 2.0 lbs, 0.9 kg |
| Background Color | Black |
| Cell Layout | 170*47 / 3*11 |
| Documentation | Full Datasheet |
Explore the technology behind this panel—click each section below to learn more.
⏬ New Generation All-Back Contact Solar Technology
The CMPower 70W panel uses 27.4% efficient Back Contact solar cells, representing a new generation of high-efficiency solar technology.
Unlike conventional solar cells, ABC (All-Back Contact) technology places the positive and negative electrical contacts on the rear side of the cell. This leaves more of the front surface available for sunlight energy absorption while creating a clean, seamless black appearance.
The result is a high-efficiency solar panel designed to deliver more power from limited installation space.
⏬ High Efficiency for Space-Constrained Installations
When available installation space is limited, panel efficiency matters.
At 27.4% cell efficiency, this 70W panel is designed to provide high output from its compact 540 × 570 mm (21.26 × 22.4 inch) footprint.
That makes it particularly useful for applications where every square inch matters, including:
- Boat bimini tops
- Boat decks
- Marine and yacht installations
- Van roofs
- Roof racks
- Rooftops
- Other curved or weight-sensitive surfaces
⏬ Lightweight & Semi-Flexible
At only 0.9 kg (2.0 lb) and just 3 mm thick, the CMPower 70W panel is easy to handle and suitable for installations where weight and profile are important.
Its semi-flexible construction allows the panel to follow suitable curved surfaces, with a maximum bend angle of 60°.
Note: This is a semi-flexible solar panel and should only be bent within its specified limits.
⏬ Enhanced Shade Tolerance
Marine and mobile installations can experience partial shading from masts, rigging, antennas, rails, roof equipment, and other obstructions.
The CMPower Back Contact panel incorporates an advanced cell and electrical design for improved performance under partial shading, helping make better use of available sunlight in real-world installations.
⏬ Designed for Marine & Mobile Applications
Built for real-world solar applications, the CMPower 70W semi-flexible panel is suitable for:
Boats • Bimini Tops • Boat Decks • Vans • Roof Racks • Rooftops • Curved Surfaces
Its waterproof IP67 junction box, marine-suitable 316 stainless steel mounting holes and eyelets, and IEC salt mist testing make it well suited for demanding installation environments.
Our New 4 Quadrant Design
The diagram along side illustrates how these amazing panels work. Instead of the normal 2 quadrant design we use a new split cell design allowing the panel to have four quadrants of solar cells linked in series and isolated with inner panel blocking diodes. If one or two quadrants are shaded, the other quadrants perform at normal output. This can increase shaded panel output by 3 times that of a standard shaded panel.
SunPower Maxeon Shade Tolerant Series
Solar panel shading is a major issue on many boats. Shading can reduce a standard panel performance by over 60%. Custom Marine Products has developed a series of semi-flexible shade tolerant solar panels that have superior performance when partially shaded by boat equipment or nearby objects. These solar panels have high performance SunPower Maxeon cells. The diagram to the left illustrates how these amazing panels work.The junction box is mounted in the center or the edge of the panel enabling the panel to have four quadrants of solar cells linked in series and isolated with diodes. If one or two quadrants are shaded, the other quadrants perform at normal output. The result is a panel that will provide up to three times the output of a standard panel when shaded. These shade tolerant panels are ideal for bimini and dodger mounting where there is boom, mast and instrument pole shading. Patent pending
What Makes Our Panels Superior
- Our Semi Flexible Shade Tolerant Panels use only SunPower Maxeon A+ Cells.
- The SunPower cells we use in these panels are 24.4% efficient.
- We use an ETFE laminate coating that won't delaminate or go milky for 10 years.
- The ETFE laminate is applied with a prismatic finish to direct sun energy into the cells.
- Panels use internal blocking diodes to isolate the quadrants unaffected by shading.
- We build 4-6 grommets into the panels edges for easy installation with our mounting kits.
- All panels come with 3 foot pigtails and MC4 connectors.
- Our junction boxes are filled with Non Gassing Silicon RTV for maximum electrical waterproof insulation and corrosion resistance.
Solar System Design and Installation
We have put together a collection of helpful information for our customers on everything to help you design you perfect system and installation instructions.
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CMPower Shade Tolerant Solar Panels for Marine Applications
CMPower’s shade tolerant solar panels featuring premium SunPower Maxeon cells and innovative wiring design.
READ MORE
Premium Marine Solar Panels/Systems and Lithium Iron Batteries
Improve your cruising experience with the highest efficiency solar panels available.
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Shipping
Products ship the day after payment (domestic).
- Free shipping on orders over $1,500 (Lower 48 US states).
- $65 flat-rate shipping for orders between $500–$1,499 (Lower 48).
- International shipping takes longer. No tariff charges added — call for pricing.
Custom Designs & Custom Made Panels Available on Request
Our engineers will work with you to design a solar system specific to your needs including Lithium Batteries if you like. (Batteries are 10% off w/ solar system purchase).
If you'd like a custom solar panel, we can do it at $10/watt, more info here: Custom Solar Panels
Call Us: 248-712-1526
All Product Specifications
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