Enerdrive ePOWER 12V 20A Smart ChargerMultistage Charging Fully automatic multistage battery charger with the ability to charge 3 separate battery banks. Separate Battery Banks Isolated charging design where battery bank one is separate from battery bank two and three. Programmable Battery bank 1 can be programmed with a different charge algorithm over banks 2 and 3. Current Control User adjustable current output (e. g. Dial the 60amp unit back to run off a 1kVA generator). Smart Charging