DC to DC battery charger ideal for charging an auxiliary battery in vehicles such as camper vans and caravans. Will charge your second battery whilst driving and will be linked to the ignition switch to avoid draining your main battery (requires hard wiring). Designed for use with batteries including VRLA (Lead Acid), GEL, AGM/EFB and Leisure on 12V systems. Can be used in conjunction with a solar panel when the vehicle is switched off. Protected against short circuits, open circuits, output reverse polarity, overcharging, over-current and overheating. Rated at IP65 water resistance.