... Key Features1.low frequency pure sine wave with Charger(HOME UPS). Never harm to any load2.Transfer Time 10ms. ... .High Power Factor0.9-1,7.Low idle current to reduce energy consumption8.low DC input, 1-3KW/12V (24 ... .9.big charge current,35A-75Amp for different mode10.Back-Feed Protection11.Full protection,short circuit,Overload,over Temp., ... 335*320Gross Weight 202226 Pure Sine Wave Home UPS N-PSW 1K-3K