Item NO : BSK-80W Maximum Power(Wp): 80W Maximum Power Voltage(V): 17.5V Maximum Power Current(A): 4.57A Open Circuit Voltage(V): 21.6V Short Circuit Current(A): 4.81A Size of Module(mm): 1196mm X 556mm X 35mm Size of Glass(mm): 1190mm X 550mm X 3.2mm Size of solar cells(mm): 125mm X 125mm Number of cells(Pcs): 36pcs Maximum System Voltage(V): 1000V Temperature Coefficients of Isc(%): 0.06 %/ Temperature Coefficients of Voc(%): 0.397%/ Temperature Coefficients of Pm(%): 0.549%/ Nominal operating cell temperature: 44.42 Temperature Range: 40- +90 Surface Maximum Load Capacity: 200kgs/m2 Allowable Hail Load: 25mm@80km/h Weight Per Piece (kg): 8.5kgs Frame(Material,Corners,etc): Aluminum Warranty : 5 years product warranty and 10 years 90% of power,25 years with 80% power. 10pcs per carton and with pallet finally.