12V 30 amp 3 bank on-board battery charger. Built-in safety: reverse polarity, over-current, over-voltage, over-temperature and ignition protection. In-line fuses for maximum DC wire protection. 100% Waterproof (IP67) and shock resistant for all fresh and saltwater applications. Dedicated battery charging, sensing and control per bank. For all 12 volt flooded and AGM lead acid batteries. 2 year warranty.