... shipping 4,Max Efficiency>92% 1000w Power inverter with charger 12v 20A,24v 10AmpProducts Feature: High Transform efficiency, fast start; Pure sine ... <2%(Linear load)Efficiency>88%>89%>90%>88%>89%>90%DC input voltage range10.5-15V21-30V42-60V10.5-15V21-30V42 ... yearCE,ROHS ,LVD,EMC Approved! 1000w Power inverter with charger 12v 20A,24v 10Amp