Shade Tolerant Design Solar Panels by CMPower

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.

Shade Tolerant Solar Panels

Click here for the solar sizing app

Discover Custom Marine Products' innovative semi-flexible shade-tolerant solar panels, perfect for boats facing shading challenges. Standard panels can lose over 60% efficiency when shaded, but our advanced panels, featuring high-performance SunPower Maxeon cells, excel under partial shade. The unique design includes a central or edge-mounted junction box, dividing the panel into four isolated quadrants. This allows unshaded sections to maintain full output, delivering up to three times the power of traditional panels. Ideal for mounting on biminis and dodgers, these panels are engineered to overcome shading from booms, masts, and instrument poles. Patent pending. If you only want the best, look no further! Highest output A+ grade solar cells (24.4-25.4% Efficient)! Want to see how shade tolerant marine solar panels work - Watch our Video!

👉 See All Marine Solar Panels We Offer and Their Specifications

Marine solar panels with A+ grade Sunpower Maxeon 24.4% efficient shade tolerant solar cells

CMPower Shade-Tolerant Solar Panels by Custom Marine Products
Model - Part Number Nominal Peak Power
Watts-Wp		 Open Circuit Voltage
Voc		 Short Circuit Current
Isc		 Nominal Voltage
Vmp		 Nominal Current
Imp		 Cell Efficiency % Solar Cell Type Cell Layout Panel Size Inches Panel Size mm Weight lbs. Weight Kg. Watts per Sq. Foot Amp Hrs per Day @ 6 Hrs Sun Watt Hrs per Day Price per Panel
Semi-flexible - SunPower Monocrystalline (ST-Shade Tolerant)
CMP23055FX-60 60 23.4 3.1 19.8 2.9 24.0 SunPower 4 x 8 21.25x22.8 540x580x3 3.3 1.5 17.8 27.7 324 $274
CMP23070FX 70 27.3 3.3 22.8 3.1 24.0 SunPower 4 x 10 21.25x27.75 540x705x3 4.5 2 17.1 32.3 378 $378
CMP23115FX-120-ST 120 24.6 6.3 20.5 5.9 24.4 SunPower 3 x 12 21.3x42.71 540x1085 4.6 2.1 19.0 55.4 648 $639
CMP23130FX-140-ST 130 26.6 6.3 22.2 5.9 24.4 SunPower 3 x 13 21.25x47.25 540x1200x3 5.1 2.3 18.6 60.0 702 $699
CMP23145FX-155-ST 155 30.8 6.5 25.7 6.0 24.4 SunPower 3 x 15 21.3x52.95 540x1345x3 5.7 2.6 19.8 71.5 837 $829
CMP23240F-ST 240 47.7 6.3 40.4 6.0 24.4 SunPower 6 x 22 31.5x58.3 800x1480 14 6.4 18.8 110.8 1,296 $1,199
CMP23260FX-STP 260 55.6 6.2 45.6 5.7 24.4 SunPower 5 x 16 34.3x55.5 870x1410 17.9 8.1 19.7 120.0 1,404 $1,199
CMP23325FX-STP 325 70.9 6.0 58.1 5.6 24.4 SunPower 6 x 17 40.7x59 1035x1500x4 22.7 10.3 19.5 150.0 1,755 $1,789
Semi-rigid - Walk-on SunPower Monocrystalline (ST - Shade Tolerant)
CMP24065SRXLP 65 24.6 3.4 20.5 3.2 24.4 SunPower 2x18/2 11.4x48 289x1219x4 4.2 1.9 17.1 30.0 351 $429
CMP24065SRX 65 27.6 3.1 23.0 2.8 24.4 SunPower 2x20/2 14.2x36.2 360x920x4 4.2 1.9 18.2 30.0 351 $359
CMP24100SRX-STP 100 37.2 3.5 31.0 3.5 24.4 SunPower 3x18/2 16.5x48 420x1220 6.8 3.1 18.2 46.2 540 $599
CMP24120SRX-P 120 25.1 6.3 20.5 5.9 24.4 SunPower 3 x 12 20.8x42.1 530x1070x4 8.6 3.9 19.7 55.4 648 $659
CMP24125SRX-P 125 27.8 5.9 22.8 5.5 24.4 SunPower 4 x 10 27.6x35.6 700x905x4 9.7 4.4 18.3 57.7 675 $739
CMP24150SRXL-165P 165 32.5 6.5 27.5 6.0 24.4 SunPower 4 x 14 26x48 660x1219x4 11.7 5.3 18.8 76.2 891 -
CMP24150SRX-165P 165 37.6 5.8 30.8 5.4 24.4 SunPower 4 x 14 26.4x48 670x1219x4 12.3 5.6 18.8 76.2 891 $999
CMP24165SRX-P 165 35.5 6.0 29.6 5.6 24.4 SunPower 4 x 13 27.6x45.7 700x1160x4 12.1 5.5 18.8 76.2 891 $999
CMP24180SRX-P 180 36.9 6.4 30.3 5.9 24.4 SunPower 5 x 11 34.3x39 870x990x4 13.4 6.1 19.4 83.1 972 $1,049
CMP24175SRX-180P 180 33.5 7.0 27.9 6.5 24.4 SunPower 7 x 7 36.4x37.6 925x955 13.2 6 18.9 83.1 972 $1,049
CMP24210SRX-200P 200 37.7 6.9 31.4 6.4 24.4 SunPower 5 x 11 26x57.9 660x1470 14.6 6.6 19.1 92.3 1,080 $1,189
CMP24260SRX-STP 260 55.6 6.2 45.6 5.7 24.4 SunPower 5 x 16 34.3x55.5 870x1410x4 17.8 8.1 19.7 120.0 1,404 $1,399
CMP24325SRX-ST/STP 325 70.9 6.0 58.1 5.6 24.4 SunPower 6 x 17 40.7x59 1035x1500x4 22.7 10.3 19.5 150.0 1,755 $1,789
Semi-rigid Carbon Fiber - Walk-on SunPower Monocrystalline
CMP24065SRXCP 65 27.6 3.1 23.0 2.8 24.4 SunPower 2 x 20 14.2x36.2 360x920x4 4.6 2.1 18.2 30.0 351 $459
CMP24100SRXC-STP 100 37.2 3.5 31.0 3.5 24.4 SunPower 3x18/2 16.5x48 420x1220x5.5 6.8 3.1 18.2 46.2 540 $649
CMP24165SRXC 165 35.5 6.0 29.6 5.6 24.4 SunPower 4 x 13 27.6x45.7 700x1160x4 11.0 5.0 18.8 76.2 891 $999
CMP24325SRXCP 325 70.9 6.0 58.1 5.6 24.4 SunPower 6 x 17 40.7x59.1 1035x1500x4 19.8 9 19.5 150.0 1,755 $2,399

CMPower Next Generation Back Contact Solar Panels Specifications:

COMING SOON — NEW GENERATION SOLAR PANELS
Introducing our next generation of high-output Back Contact (BC) solar panels, designed to deliver more power, better performance, and exceptional reliability for marine and off-grid applications.
✔️ High-efficiency Back Contact cells (27.4%) — among the highest-efficiency commercially available solar cell technologies
✔️ Higher output per square foot — get more power from limited roof or deck space
✔️ Improved shade tolerance — different electrical characteristic for better shade tolerance
✔️ Improved reliability and durability for demanding marine and off-grid environments
✔️ Same price as our SunPower series
✔️ Compatible sizing — panel dimensions are kept close to our current models, making them ideal for both new installations and replacement panels
CMPower Next Generation Back Contact Solar Panels by Custom Marine Products (Enhanced Shade Tolerance)
Model - Part Number Nominal Peak Power
Watts-Wp		 Open Circuit Voltage
Voc		 Short Circuit Current
Isc		 Nominal Voltage
Vmp		 Nominal Current
Imp		 Cell Efficiency % Solar Cell Type Background Color Cell Layout Panel Size Inches Panel Size mm Weight lbs. Weight Kg. Watts per Sq. Foot Amp Hrs per Day @ 6 Hrs Sun Watt Hrs per Day Price per Panel
Semi-flexible - Back Contact Monocrystalline (ST-Shade Tolerant)
CMP23055FB-70-ST 70 24.3 3.6 20.8 3.4 27.4 BC B 170*47/3*11 21.26x22.4 540x570x3 2.00 0.90 21.2 32.3 378 $274
CMP23070FB-90-ST 90 31.0 3.6 26.5 3.4 27.4 BC B 170*47/3*14 21.26x27.75 540x705x3 3.53 1.60 22.0 41.5 486 $378
CMP23115FB-140-ST 140 48.6 3.6 41.6 3.4 27.4 BC B 170*47/3*22 21.26x42.72 540x1085x3 4.08 1.85 22.2 64.6 756 $639
CMP23130FB-155-ST 155 55.3 3.5 47.3 3.3 27.4 BC B 170*47/3*25 21.26x47.64 540x1210x3 4.63 2.10 22.0 71.5 837 $699
CMP23145FB-170-ST 170 59.7 3.5 51.0 3.3 27.4 BC B 170*47/3*27 21.26x52.56 540x1335x3 5.95 2.70 21.9 78.5 918 $829
CMP23240FB-280-ST 280 45.7 7.6 39.1 7.2 27.4 BC B 182*47/4*31 31.5x59.6 765x1510x3 10.58 4.80 21.5 129.2 1,512 $1,120
Semi-rigid - Walk-on Back Contact Monocrystalline (ST - Shade Tolerant)
CMP24065SRB-75-STP 75 26.5 3.5 22.7 3.3 27.4 BC B 165*47/2*18 14.2x35.8 360x910x5 4.85 2.20 21.2 34.6 405 $359
CMP24065SRBL-85-STP 85 38.32 2.75 32.76 2.6 27.4 BC B 130*45/2*26 11.4x48 290x1220x5 5.29 2.40 22.4 39.2 459 $429
CMP24100SRB-110-STP 110 36.9 3.7 31.5 3.5 27.4 BC B 182*47/2*25 16.14x48 410x1220x5 6.83 3.10 20.4 50.8 594 $599
CMP24120SRB-135-STP 135 48.6 3.4 41.6 3.2 27.4 BC B 170*47/3*22 21.26x42.3 540x1075x4 8.38 3.80 21.6 62.3 729 $659
CMP24150SRBL-195-STP 195 38.3 6.5 32.8 6.1 27.4 BC B 158*45/4*26 26x48 660x1220x5 12.13 5.50 22.5 90.0 1,053 $999
CMP24210SRB-235-STP 235 44.2 6.7 37.8 6.3 27.4 BC B 158*47/4*31 26x58.9 660x1470x5 14.55 6.60 22.5 108.5 1,269 $1,189
CMP24325SRB-370-STP 370 66.3 6.9 56.7 6.5 27.4 BC B 164*47/6*30 40.7x58.7 1035x1490x5 22.93 10.40 22.3 170.8 1,998 $1,789
Semi-rigid Carbon Fiber - Walk-on Back Contact Monocrystalline
CMP24065SRCB-75STB 75 26.5 3.5 22.7 3.3 27.4 BC B 170*47/2*18 14.2x35.8 360x910x8 6.61 3.0 21.2 34.6 405 $459
Rigid - Back Contact Bifacial Monocrystalline (ST - Shade Tolerant)
CMP22110SB-140 140 48.65 3.57 41.6 3.37 27.4 BC Bifacial 170*47/3x22 21.26x41.7 540x1060 22.7 64.6 756 $546
CMP22140SB-170 170 33.91 6.22 29.0 5.87 27.4 BC Bifacial 158*45/4x23 26.8x41.7 675x1060 21.9 78.5 918 $649
CMP22150SB-190 190 22.11 10.66 18.9 10.05 27.4 BC Bifacial 170*47/3x30 21.26x56.9 540x1445 22.6 87.7 1,026 $739
CMP22175SB-210 210 70.02 3.72 59.9 3.51 27.4 BC Bifacial 175*47/5x19 36.2x37 920x940 22.6 96.9 1,134 $849
CMP22200SB-245 245 44.2 6.9 37.8 6.5 27.4 BC Bifacial 164*47/4x30 26.8x56.9 680x1445 23.1 113.1 1,323 $989
CMP22225SB-270 270 45.7 7.3 39.1 6.9 27.4 BC Bifacial 182*45/4x31 30.x56.3 760x1430 23.0 124.6 1,458 $1,129
CMP22270SB-325 325 55.28 7.29 47.3 6.88 27.4 BC Bifacial 175*47/5x30 36.2x56.9 920x1445 22.7 150.0 1,755 $1,299
CMP22440SB-ST 440 27.4 BC Bifacial 182*47/6x31 44.3x59x1.4 1125x1500x35 $1,488
CMP22550SB-ST 550 58.97 11.57 50.40 10.91 27.4 BC Bifacial 182*47/6x40 44.6x75.6x1.4 1134x1920x35 58.2 26.4 23.5 253.8 2,970 $1,925
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High Performance CMP Semi-Flexible Marine Solar Panel Specifications​ Summary

SunPower Maxeon Series

Our SunPower Maxeon Series solar panels are made with SunPower Maxeon Gen III solar cells which have the highest energy yield (power output) of any solar cell commercially available.  SunPower Maxeon cell technology uses a back contact design which maximizes the sunlight energy available to each solar cell and enables a sunlight to electric conversion efficiency of up to 25.4%. Excellent for bimini and dodger canvas mounting.

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 Our Customers Say

Shade Tolerant Flexible Solar Panels Explained

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.

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

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