Nominal DC voltage 400 VDCMaximum PV open voltage 500VMPPT voltage rang (Vdc) 110~480MPPT efficiency at output > 10% > 99%System start-up voltage 120VDCWorking voltage range(Vdc) 100 ~ 500Full rating range (VDC) 250~500Max. Input current (ADC) 8.9Shutdown voltage 70 VDC typicalDC voltage ripple < 5%DC insulation resistance > 1M&Omega;Nominal output power 4000WMaximum output power 4000WGrid voltage range Single phase,Nominal output current(AAC, RMS) 6.5Maximum output current (AAC, RMS) 7.2O/P current distortion at full rating <3%Power Factor at full rating >0.99Islanding protection AFIInternal power consumption ~7WNight power consumption ~0WMaximum conversion efficiency (DC/AC) 95.5%European Efficiency 94.5%GFCI Threshold See ground fault current detectionCurrent Range 0~500mAFrequency range 0~700HzProtection degree IP 65IP65Operation temperature -20 to 55Humidity 0 to 95%, non-condensingHeat Dissipation ConvectionAcoustic noise level <35dBAAltitude Up to 2000m without power deratingDimension (mm) 415&times; 376&times; 125Weight (Kg) 24