... Load<5%Imbalance voltageBalance load≤1%,Imbalance load≤3%Phase shift angleBalance load≤±1°, Imbalance load≤±2° ... Over-voltage, under-voltage; Output overload, short-circuit; Inverter over-temperature; Battery under-voltage, over-voltageRunning temperature& ... between failures300,000 HoursotherDustproof and damp-proof, isolating inverter transformer, Lightning Surge absorption, Static switches and manual ...