... the worst working environment. 4)Perfect protectionPerfectly system protection functions: It has AC over-voltage, under-voltage ... under-voltage, output overload, short circuit protection, inverter, rectifier over-temperature protection, voltage under-voltage warning, battery over ... Load<5%Imbalance voltageBalance load≤1%,Imbalance load≤3%Phase shift angleBalance load≤±1°, Imbalance load≤±2°Transient ...