This advanced fully automatic three-stage 30 Amp battery charger is ideal for charging all types of 12 Volt lead-acid batteries ( Flooded / Absorbed Glass Mat (AGM) / Gel Cell) from a 120 VAC, 50/60 Hz (default) or 230 VAC, 50/60 Hz (internal jumper setting) AC source. User selectable ( by DIP Switch) for 2 or 3 stage, rapid and safe charging of stand-alone and loaded Lead Acid Batteries. The unit can also be used as a DC Power Supply. Features include overload, short-circuit and over-temperature protection. The unit allows charging of up to 3 separate battery banks.