Key Specifications/Special Features: Made of mono-crystalline solar silicone cells Peak power: 150 watts (day time with fully sun shine) Open voltage circuit (voc):41.04V Max. power voltage (Vmp): 34.1V Max. power current (Imp): 4.38A Short circuit current (Isc): 4.83A Cells in series: 72pcs Nominal working temperature: -20℃ to +40℃ Dimensions: 1580x808x50mm Weight: less than 19kg Working life: more than 25 years