Fully automatic 3 stage charging (bulk, absorption and maintenance). Battery selector (lead acid/AGM, High Performance AGM or gel) by specific bank. On demand battery equalization prevents sulfation build up on plates to extend battery life. LED's for check connection, battery charging %, full charge, power on, and indication of battery types. Waterproof, shock and vibration resistant construction. Saltwater tested and fully resistant to corrosion. For use with 12V/6-cell batteries (40-130 amp hour rating) that are flooded/wet cell, maintenance free, starved electrolyte (AGM), high performance AGM or gel. 10 amps per bank.