Tripp Lite's RV3012OEM Inverter/Charger is the quiet alternative to gas generatorswith 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 DC-to-AC inverter with automatic line-to-battery transer and integrated charging system serves as an extended run UPS, a standalone power source or an automative inverter suitable for rugged RV applications. Supplies up to 3000 watts of continuous 120V AC power from any 12V DC battery or automotive DC source. OverPower TM inverter output feature temporarily provides up to 150% of the continuous output for 1-60 minutes and DoubleBoost TM 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 hardwire AC input is energized, commercial power passes through to connected equipment and the battery set is recharged via 3 stage, selectable 35/140 amp charging system. Includes optional dual-circuit hardwire AC input to enable full charger output from circuit 1 with a 120V 20A input and full AC pass-through from circuit 2 with a second 120V 20A input feed. In UPS mode, the APS system responds to blackouts and voltage fluctuations with a near instantaneous automatic transfer to battery