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Ameresco Solar 20J 20Watt 12VDC Polycrystalline Solar Panel w/ Junction Box

Ameresco Solar 20J 20Watt 12VDC Polycrystalline Solar Panel w/ Junction Box

Our Price: $142.89

Product Code: 20J

Description Document(s)

Ameresco Solar 20J 20Watt 12VDC Polycrystalline Solar Panel w/ Junction Box

Manufacturer Part#: 20J

This line of modules is the direct result of over three decades of design, manufacturing and use. Attending to every detail in the design and manufacture of our products, our process controls and testing methods have optimized module life and electrical energy production.

  • Built To Last - From mountaintops to off-shore platforms, on weather stations in the bitter cold of Antarctica and on telephone signal repeaters in the hot Australian outback, the technology has been proven in the harshest environments
  • Accessible Junction Box for Off-Grid Connections - J-type junction box has accessible terminals for easier module interconnections in off-grid applications, and it allows fitting cable glands for various sections
  • High Reliability - Cell interconnections and diode placement use well-established industry practice and are field-proven to provide excellent reliability

The Ameresco Solar 20J is certified for use in Class 1 Division 2.


Full data sheet can be found in the Document(s) tab above.

Electrical Data
Maximum Power (P max) 20W 14.4W
Voltage at P max (Vmpp) 17.9V 15.9V
Current at P max (Impp) 1.12A 0.91A
Short Circuit Current (I sc) 1.16A 0.94A
Open Circuit Voltage (V oc) 22.1V 20.1V
Module Efficiency 9.4%
Tolerance (P max) ± 10%
Nominal Voltage 12V

STC (Standard Testing Conditions): Irradiance 1000 W/m 2; AM 1.5 Solar Spectrum; 25°C Module Temperature

NOCT (Nominal Operation Cell Temperature): Irradiance 800 W/m 2; Air Temperature 20°C; Spectra at AM 1.5; Wind at 1 m/S

Mechanical Data
Solar Cells 36 polycrystalline silicon cut cells connected in series
(L x W x H)
425 x 502 x 50 mm
16.7 x 19.8 x 2.0 in
Weight 3.0 kg / 6 lbs
Front Cover High transmission 3.2 mm (1/8th in) glass
Encapsulant EVA
Back Cover White Polyester
Frame Silver Anodized Aluminum
Junction Box IP65 with 4 terminal screw connection block; accepts PG 13.5, M20 13mm (1/2") conduit, or cable fittings accepting 6-12mm diameter cable. Terminals accept 2.5-10mm2 (8-14 AWG) wire

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