Multi-Bank chargers are extremely handy and are used often in the marine industry. The most common multi-bank chargers come in 2, 3 and 4 banks but can come with up to 12 banks! Each bank is often isolated, meaning if it is a 4 bank charger, for example, it is like having 4 individual units that are simply built into one housing but are all independent of each other. The most popular units produce 10 amps per bank. We have chargers that produce as little as 1.25 amps per bank and as much as 15 amps per lead.