output 20watttypepolycrystallineopencircuitvoltage21.6Vmaximumpowervoltage(Vmp)17.6Vshortcircuitcurrent(Isc)1.3Amaxinmumpowercurrent(Imp)1.13Aoutputtolerance(+-5%)19-21Woperatingtemperature-40℃to 60℃frameAluminumalloyefficiency15%connectionjunctionboxcableNOnumberofcells36glasstemperedglassbatteryvoltage12Vdimension291*635*25mmweight7pcs/BOX