Inverter with inner charger and automatic switch, when power off it can switch automaticlly and take use off battery power to run load, when power on it also can switch automaticlly and take use of main power, at the same time charging battery. 

Rate power: 2000VA/1000W
Peak power: 4000VA/2000w
Input Voltage: 12V
Output Voltage: 220Vac/230Vac+/_10% or 100vAC/110VAC+/_10%
Frequency range 42~62Hz
Waveform: Modified sine wave
Transfer Time 8ms

Battery input voltage: 160vAC_280VAC or 60VAC-140VAC Battery voltage 12VDC/24VDC
Charge voltage 13.8V+/_0.5V
Charge current Maximum 12A
Indication: AC out Voltage and battery capacity
PROTECTION: Discharge overcharge overload and output short current Protection
Audible Noise: <45dB
Environment Temperature: 0-45
Humidity 0%-95%, Non-condensing

Net/Gross Weight 4.8kg
Dimension (W*D*H)mm 370*210*118
Packing (W*D*H)mm 460*330*215