Tripp Lite's APS700HF Ultra-Compact 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 700 watts of continuous 120V AC power to 1 AC outlet from any 12V battery or automotive DC source. OverPower inverter output feature provides up to 120% of the continuous output for up to 5 seconds, and DoubleBoost inverter output feature delivers up to 200% of the continuous output for up to 2 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, 6-amp charging system. In UPS mode, the APS system responds to blackouts and voltage fluctuations with a near instantaneous automatic transfer to battery-derived AC output. Includes a set of high current DC input terminals for simple installation (user supplies batteries and cabling - see owner's manual for recommendations). Passes sine wave utility or generator power during battery charging and UPS line power mode, plus efficient PWM sine wave AC output in inverter and UPS backup modes. Supports an unlimited amount of runtime with any number of user-supplied batteries connected.