The SS-15A3-OB Ship-N-Shore® is a Fully Automatic Microprocessor Controlled battery charger Designed especially for marine applications. A true, Three Bank, On-Board, 15 Amp Marine Charger that permanently mounts to your boat. Its weather proof, water tight seal ensures that there will be no leakage and is safe to store on-board, all year round. The charger works with regular and deep cycle batteries, including flooded, AGM and gel cell. This smart charger automatically remembers the last battery type selected. Single and Dual Banks also available.