1.high frequency,online double conversion,IGBT 2.N+X redundant,Hot-swap, ... , 3/1, 1/3, 1/1GREAT PERFORMANCE INDEXOverall efficiency ≥ 95%, inverter efficiency ≥97%,THDI ≤ 3%, and input PF≥ 0.99Little weight ... UPS is very easy, just with the power module changed. pure sine wave online UPS