Automatically switches from mains to battery supply if mains should fail. Inverter Output: Power: 1000 watt Start-up: 2000 watt Voltage: 230VAC Regulation: 8% (rms) Frequency: 50Hz (1%) Waveform: Modified Sine Input: Nominal Voltage: 12V Low BatteryAlarm: 10.7V High Voltage Alarm: 16V Efficiency: 90% Charger: Input Voltage: 200 - 240VAC Input Frequency: 47 - 53 Hz Power Consumption: 294 watt Efficiency: 87% Equalising Voltage: 14.6VDC Float Voltage: 13.7 VDC Charge Current: 20 Amp Protection: Over Teperature >65 deg. centigrade Short crcuit Overload Dimensions: 152 x 70 x 400 Weight: 4.2 kg