Maximum Power(Pmax) 540W 545W 550W Open-circuit Voltage (Voc) 49.8V 50V 50.2V Maximum Power Voltage(Vmp) 42V 42.2V 42.4V Short-circuit Current (Isc) 13.66A 13.72A 13.78A Maximum Power Current (Imp) 12.86A 12.91A 12.97A Solar Panel Efficiency 21.13% 21.32% 21.52% Power Tolerance 0~+5W Standard Test Environment Irradiance 1000w/m2, Ambient temperature 25℃, Spectrum AM 1.5 Maximum Power(Pmax) 555W 560W Open-circuit Voltage (Voc) 50.4V 50.6V Maximum Power Voltage(Vmp) 42.6V 42.8V Short-circuit Current (Isc) 13.42A 13.90A Maximum Power Current (Imp) 13.03A 13.08A Solar Panel Efficiency 21.48% 21.67% Power Tolerance 0~+5W Standard Test Environment Irradiance 1000w/m2, Ambient temperature 25℃, Spectrum AM 1.5