3W 12V SOLAR PANEL

CAT# SPL-003
$20.95 each
Quantity:  
 
Rugged 3W 12Vdc photovoltaic solar panel. Sealed to withstand hail, snow and wind. Multicrystalline silicon solar cells in a heavy-duty anodized aluminum frame. High-transparency, low-iron tempered glass. 188 x 195 x 17mm. Junction box with screw or solder terminals. CE.

Specs:
Max Power: 3W
Open Circuit Voltage: 21.6V
Operating Voltage: 17V
Operating Current: 0.18A
Short Circuit Current: 0.21A
Average Customer Review:  (1 Review) Write A Review

Customer Comments

Average Customer Review:  (1 Review) Write A Review

Lawrence Weill from Seal Beach, CA USA
Excellent Quality and As Advertised
This solar panel is very sturdily built and attractive. I have tested it in bright sunlight and it definitely meets specifications. I am not sure how well sealed it is, since I don't want to immerse it in water to find out. I have calculated the efficiency at the 3 W maximum power output to be about 14%, under the assumption that the sun was providing 1000 watts/square meter of radiation during testing. The panel keeps quite cool in a 70 degree ambient air temperature, probably because the frame provides plenty of open air space behind it. Like most solar panels, its equivalent circuit looks like a voltage source at lower currents and like a current source when its output is close to being shorted (i.e., it does not have a constant source resistance). At the maximum power point the output voltage is about 80% of its open circuit voltage, which seems very good.

I am very pleased with this purchase!