Clever 500W 
Input voltage: 175 - 265Vac
Input frequency: 50Hz+ 5Hz
Inversion voltage: 220Vac+ 2%
DC voltage: 12Vdc
Output waveform: Sine wave
THD: < 3%
Transfer time: < 4ms Automatic transfer
Recharge current: Average charge current: 
8A (350-500W); 10A (650-2000W).
Max charge current: 10A (350-Max charge 
current: 10A (350-2000W).
CPU controls automatic charge.
Overload protection: Lock the machine automatically 
when overload over 100-120% for 25seconds; 
lock themachine automatically[...]