Tripp lites apsint2012 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 2000 watts of continuous 230v ac power from any 12v 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 selectable 1560 amp charging system in ups mode the aps system