Nominal power Pmax: 165W Tolerance :5% Kind of cell( mono,poly): mono or poly Open circuit voltage (Voc): 35V Optimum operating voltage (Vmp): 23.5V Short circuit current (Isc): 7.82A Optimum operating current (Imp): 7.02A Maximum power (Pm): 165W A/A1(mm): 810/405 B(mm): 930 Mounting hole sizemm: 6-φ9.0 Weight: 20.0KG Max system Volt: 600V Thickness(without box):46mm Weight[:17kg material of Frame: Alu Guarantee of power: 80% of 20 years Guarantee on the whole product : 2 years Kind of glass and its thickness:AFG 3.2mm The conversion efficiency of the solar cell is 16%. Solar cells are encapsulated between a tempered glass cover and a pottant with back sheet to provide efficient protection from the severest environmental conditions. Long operation life: 20 year limited warranty of 80% minimum rated power output IEC, TUV and CE certificated