Solartech SPM020P 20-Watt 12-Volt Polycrystalline PV Solar Panel High powered 20W multicrystalline solar panel Max Voltage 17.2V Max Amperage 1.17A 22.0 in x 14.2 in x .7 in 10 year limited warranty 90% of power, 25 year warranty 80% of power ouput