1, Off grid Inverters 2, Input voltage range: 100V~280V 3, Output: 220V,50/60Hz 4, DC: 24V 5, Polarity ... currentLED graphic Humanistic and friendly interfaceInput/output voltage and frequency, battery capacity, loading and etc can be showed on screen.Sensitive ... down and giving warning.Individual chargerWhen main power comes back, battery will be recharged automatically even Inverter was shut off. ...