... .All kinds of options include main back feed protection, bypass back feed protection, battery leakage protection, battery start kit, output isolation transformer and ... -4-3(RS)IEC61000-4-4 (EFT)IEC61000-4-5 (Surge)Insulation resistance>2M (500VDC)Dielectric strengh(input,output to PE ... in 1 minuteSurge protectionComply with IEC60664-1 class IV, endure surge of 1.2/50us + 8/20us higher than 6KV/3KAIP ...