... effectiveness, but also make input efficiency more than 95%. 3)Pure-online double conversion technologyReliable and stable, after filtered ... four wires, 380V±1%Frequency50HZ/60HZ±0.05%(Battery)Harmonic distortionLinear Load<3%, Non-linear Load<5%Imbalance voltageBalance load ... ≤1%,Imbalance load≤3%Phase shift angleBalance load≤±1°, Imbalance load≤±2°Transient ...