Maximum power(w) 230w Optimum power voltage(vmp)30.36v Optimum operating current(imp)7.58a Open circuit voltage(voc)36.42v Short circuit current(isc)8.11a Cell efficiency (%) 15.75% Module efficiency (%) 14.17% Solar cell 156*156 poly Number of cell(pcs) 6*10 Size of module(mm) 1640*990*40 Front glass thikness(mm)3.2 Surface maximum load capacity2400pa Allowable hail load 23m/s , 7.53g Weight per piece(kg) 18.6 Bypass diode rating(a) 12 Frame(material corners, etc.)40# Backing (brand type) tpt Temperature range -40¡ãc to +85¡ãc Ff (%)70-76% Standard test condition am1.5 1000w/©o 25 +/-2¡ãc