- 12V DC or 120V AC input; 120V AC output (hardwired) - 1250 watts continuous and 2500 watts DoubleBoost inverter output - 3 stage, 14/55 amp selectable wet/dry cell battery charger - Built-in Isobar® premium AC surge protection and Auto Transfer Switching option for battery backup / UPS operation - Tested to power inverter standards UL458 (USA) and CSA (Canada) - High reliability large-transformer design with protected DC and AC wiring terminals