Tripp Lite's APS750 DC-to-AC inverter with automatic line-to-battery transfer and integrated charging system serves as an extended run UPS, a standalone power source or an automotive inverter. Supplies up to 750 watts of continuous 120V AC power to 2 AC outlets from any 12V battery or automotive DC source. OverPower™ inverter output feature temporarily provides up to 150% of the continuous output for 1-60 minutes and DoubleBoost™ inverter output feature delivers up to 200% of the continuous output for up to 10 seconds, providing the extra power needed to cold start heavy-duty tools and motorized equipment. When AC cable is connected to a live wall socket, commercial power passes through to connected equipment and the battery set is recharged via 3 stage, 20 amp charging system. Supports an unlimited amount of runtime with any number of user-supplied batteries connected.