ProMariner ProIsoCharge Battery Isolator 120Amp 1-Alt 2-Bat - 12V – Marine Boat Replacement Part is organized for ignition & electrical engine parts shoppers who need a clear, professional marine parts buying experience.

ProIsoCharge Series Model ProIsoCharge120 1•2 Part No. 23121 System Volts DC 12 Max DC Amps 120 Amp Alternator Input 1 Battery Outputs 2 Size 5.35"(l) x 5.875"(w) x 3.125"(h) Weight 2 lbs Significantly Smarter... ProIsoCharge delivers digitally controlled alternator output distribution while protecting the health of engine start batteries. An industry changing design that provides intelligent and zero voltage loss isolation, charging of up to 3 other battery banks off a single alternator (model specific). For dual engine applications, ProIsoCharge offers an exclusive 2 alternator input model with up to 4 battery banks. Smart enough to provide priority charging to a battery bank that's under

Fitment & Product Details

• Brand / Manufacturer: ProMariner
• Voltage: 12V

• Search-optimized by brand, system, part type, and fitment cues.
• Verify compatibility with your original part number, engine model, and application before ordering.
• Built for boat owners, e-commerce shoppers, and professional marine service teams.