Multi-stage 12V DC-DC 20A battery charger with direct solar input suitable for flooded cell, lithium, AGM/GEL and lead crystal batteries. Compact rugged design with screw-on mounting points. Operating temperature of up to 70 degrees C, so suitable for under-hood installation. Charge auxiliary, boat, caravan or camper trailer batteries from the vehicle whilst driving. Or deep cycle battery via the crank battery on boat.