Maximum power(w) 180w Optimum power voltage(vmp) 37.72v Optimum operating current(imp) 4.77a Open circuit voltage(voc) 44.71v Short circuit current(isc) 5.10a Cell efficiency (%) 16.96% Module efficiency (%) 14.09% Tolerance wattage(e.G.+/-3%) ¡¿ñ3% Noct 47¡ãc +/-2¡ãc Temperature coefficients of isc(%)¡æ +0.04 Temperature coefficients of voc(%)¡æ -0.38 Temperature coefficients of pm(%)¡æ -0.47 Temperature coefficients of im(%)¡æ +0.04 Temperature coefficients of vm(%)¡æ -0.38 Solar cell 125*125 mono Number of cell(pcs) 6*12 Size of module(mm) 1580*808*40 Front glass thikness(mm) 3.2 Surface maximum load capacity 2400pa Allowable hail load 23m/s , 7.53g Weight per piece(kg) 15 Bypass diode rating(a) 12 Frame(material corners, etc.) 40# Backing (brand type) Tpt Temperature range -40¡ãc to +85¡ãc Ff (%) 70-76% Warranty 25 year limited power warranty 10 year limited product warranty Certifications Iec 61215, iec 61730, ul1703 Packing carton box 1*20' 14pallets/378pcs 1*40' 28pallets/756pcs