Capacity 6000V/4200W, Rating input voltage 230V, Operating voltage range 170V-280V, Input power factor ≥99%, Norminal output voltage 230V, Battery DC voltage 240VDC, Battery type 12/7AH*20, Back up time(50% load) 20min, Back up time(full load) 7min, Charge current(Standard unit) 1A, Typical recharge time 6-8hours(to 90% of full capacity), Noise level 45dB, LCD display, Cold start