|  lnput voltage  | 220V± 25% | 
|  lnput frequency  | 50Hz/60Hz± 5% | 
|  Control mode  | SPWM | 
|  Output waveform | Sine wave, THD <3% | 
|  Output voltage accuracy | 220V± 1.5% | 
|  Output frequency | 50Hz/60Hz± 0.5% | 
|  Output transient response | ±4% (100% load varies) | 
|  Output wave crest ratio | 3: 1 | 
|  Output overload capacity | 120% rated load, turn to bypass within 25s,120%25s | 
|  Output power factor | 0.8 | 
|  Transition time when power is  off | Zero | 
|  Battery type  | Maintenance-free lead acid battery, 16 12VDC | 
|  Time for supplying power | 10 min (Standard), the time can be selected if the machine is a long time delay machine | 
|  Charge time  | Charge 90% within 7~10h | 
|  Protection function  | Protection against overload, short-circuit, battery under voltage | 
|  lndication Status  | Normal commercial power (Green lamp) , normal inversion (Green lamp), bypass (Yellow lamp), short-circuit or under voltage (Red lamp) | 
|  Sound alarm  | When commercial power is off or too low, it will sound for once every 4s; when the battery is under voltage, it will sound for once every 1s; when the fault shows or battery is used up, it will sound continuously. | 
|  lnterface to computer  | 9-pin D type connector (Optional part) | 
|  Environment | Temperature: 0~40 , relative humidity: 95%(no condensation) |