The PowerVerter RV1250ULHW 1250W Inverter is the quiet alternative to gas generators with no fumes, fuel or noise to deal with!. It provides equipment with utility- or generator-supplied AC electricity filtered through premium ISOBAR surge protection. This 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 suitable for rugged RV applications. Supplies up to 1250 watts of continuous 120V AC power from any 12V DC battery or automotive DC source. In UPS mode, the APS system responds to blackouts and voltage fluctuations with a near instantaneous automatic transfer to battery-derived AC output. When hardwire AC input is energized, commercial power passes through to connected equipment and the battery set is recharged via 3 stage, selectable 14/55 amp charging system. Highly adaptable to a variety of applications and site conditions with adjustable charger settings for wet/gel battery types and selectable line to battery power transfer voltages.