... power factor, low current THD, high efficiencyIntelligent battery management, extending battery lifetimeIntelligent self-diagnose function, all kinds of fault protection, large capability ... (EFT)IEC61000-4-5 (Surge)Insulation resistance>2M (500VDC)Dielectric strengh(input,output to PE)2820Vdc, leakage current lower than 3.5mA ...