... power is off, inverter comes into work state.DC power type means the inverter power supply is main when the city power is normal, when inverter power is off, city power ... ~90%Sea Level(m)≤ 2000DISPLAYLCD Input/output voltage, frequency, output current, temperatuerLEDline, inverter, battery, output LoadMECHANICAL19 Inch Rack Type(D× W× H ...