Pro IsoCharge delivers digitally controlled alternator output distribution while protecting the health of engine start batteries. Eliminate typical alternator voltage loss of up to .6VDC that is commonly associated with traditional diode based isolators. Intelligent zero volt loss isolation ensures fully charged batteries and faster charging times. Installed with the ProNautic P Series chargers, a boat owner can enjoy the full benefit of shore power and on the water charging. Amps 120A Banks 2 Volts 12 Size 5.35" L x 5.875" W x 3.125" H