Output precision 
Utility Mode: ± 10%
Battery Mode: ± 10%

Frequency, Hz: 45 ~ 65
Waveform: sinwave
Protection 
AVR mode: output high / low voltage, overload, short circuit, surge
Battery mode: battery low voltage, overload, short circuit, battery reverse connection (optional)

LCD display: AC input voltage, battery mode,
error, charge battery, overload
Audible alarm:low battery voltage, overload, error
Transfer time: <8ms
Battery: 
Type: maintainance-free sealed lead acid battery
voltage, Vdc: 24
Charge current: 10 to 20A

Operation temperature: -5 ° C ~ 40 ° C
Storage temperature: -15 ° C ~ 45 ° C
Humidity: 10% ~ 90%, non-condensing
Noise: <45dB
Certificates: EMC + LVD
Size, D * W * H mm: 350 * 143 * 210
N.W., kgs: 12.5