Maximum power (watt) 280W Maximum power (watt)                                         280W Production tolerance                                           +3% /-3%Maximum power voltage                                       35.5 VMaximum power current                                       7.88 AOpen circuit voltage                                             42.5 VShort circuit current                                             7.95 ASize of module (wide and high)                             1950*990*46 mmFrame  Anodized Alum.                                       Alloy 46mm thicknessNumber of cells                                                   72pcsSize of cells(wide and high)                                  156*156 mm mono cell Weight per piece                                                 28.5 kgType of junction box                                            TUV  certified junction box Certificates                                                         CE, ROHS,ISO9000Cable type and length                                          connector type 4c TUV certified cable 1m longMulti contact connector(compatible to MC type IV)Maximum system voltage                                    1000VTemperature coefficient of Isc                              ±0.05%Temperature coefficient of Voc                             -0.33%Temperature coefficient of power                          -0.5%Temperature coefficient of Imp                             +0.08%Temperature coefficient of Vm                             -0.33%NOCT(nominal operating cell temperature)           - 45to +85 Insulation                                                         100MOhmVoltage standoff                                                AC2000V, DC 3000VWind bearing                                                    60m/s(200kg/sq.m)Impact resistance hail impact test 227g steel ball fall down from 1m  heightEncapsulated with toughened glass              Low iron tempered glass with thickness of 3.2mm,light transmittance above91%Conversion efficiency Cell conversion                   efficiency15.75%Quality guarantee       2years product warranty,10years 90% and 25years 80% of the power

Mono-crystalline Silicon