A Trickle Charger has many names , Battery Maintainer, Battery Master ,Battery Saver, Reverse Charger, Top Up Charger, Battery Equaliser, but its purpose is to keep a Source / Vehicle Battery charged & protected from damage during prolonged periods of Vehicle, Boat & Motorhome inactivity or storage. The charger feeds a low current into the Source Battery to compensate for self discharge, alarm & tracker loads while ensuring the charge of the Auxiliary / Leisure Battery is maintained. The trickle charger also uses surplus solar /mains hookup power to charge the vehicle battery when the leisure battery is fully charged