The Tripp Lite APS750 750 Watt PowerVerter APS 12-Volt DC 120-Volt AC Inverter Charger is a reliable power source for a wide variety of equipment ranging from power tools and pumps to portable lighting and computer equipment in heavy-load conditions. With no fumes, fuel or excess noise, it?s an excellent alternative to generator power. The DC to AC inverter features an automatic line-to-battery transfer switch and integrated charging system that allow it to work as a vehicle inverter, standalone AC power source or extended-run UPS. An automatic overload detector, cooling fan and resettable AC circuit breakers protect the unit from damage. Designed for easy installation in RVs, over-the-road trucks, fleet vehicles and emergency vehicles, the APS750 converts stored power from any 12 volt battery or automotive DC source to safe, stable, computer-grade AC power for unlimited runtime. When hardwired to an external 120 volt AC source, the unit keeps the user-supplied battery charged via a 3-stage 20 amp charging system while simultaneously delivering AC power to connected equipment. When used as a UPS, the APS750 responds to blackouts and brownouts with an automatic, instantaneous transfer to battery-derived AC output. LEDs on the unit indicate AC/DC operational modes, overload status, DC voltage level, shutdown status and system fault status. Built in mounting feet help installation on any rigid, horizontal surface.