The PowerVerter MRV2012UL Inverter is the quiet alternative to gas generators -- with no fumes, fuel or noise to deal with!. This heavy-duty 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 2000 watts of continuous 120V AC power from any 12V DC battery or automotive DC source. When hardwire AC input is energized, commercial power passes through to connected equipment and the battery set is recharged via 3-stage charging system with user-selectable 25/100 amp charger output. In UPS mode, the MRV APS system responds to blackouts and voltage fluctuations with a near-instantaneous automatic transfer to battery-derived AC output. 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.