It runs off both either AC or DC depending on what you haveon. The refrigerator is plugged into a receptacle under the counter top. Thereceptacle is tied to the outlets breaker on the AC side of your panel. Thefrig also has a dial switch inside the frig, left hand side upper corner. Ifthe AC outlets switch is off it will still pull power from the DC side if the dialswitch in the frig is on.