... 1350Standby power kVA/kW1812.5/1450Rated voltage V400/230Output frequency Hz50The steady-state voltage adjustment rate %±1Voltage fluctuation ... %≤0.5Frequency flutuation rate %≤0.5Load mutations frequency stability of time(S)≤3Load mutations voltage stability of ... / Line voltage, three-phase currents, the battery voltage, frequency, hydraulic, water temperature, runtime, display alarming fault, engine ...