Recharges your RV’s battery to 90% in 2-3 hours and extends your battery’s life! Most converters with a built-in battery charger only have one charging mode, 13.6 volts. Includes a BUILT-IN Charge Wizard. The 9200 has four charging modes and will maintain your battery for longer life and features reverse battery protection, filtered DC power, electronic current limiting, low line voltage protection, intelligent cooling fan, high voltage protection, automatic thermal shutdown, and variable speed fans. Replaces any floor/bunk mounted converter. 1/box.