ProMariner 130A 2-Alternator 2-Battery Isolator

Description

The ProMariner 130A Battery Isolator is designed for marine and mobile electrical systems that use two alternators to charge two separate battery banks. It allows charging current to be distributed while keeping the connected battery banks electrically isolated from one another, helping prevent one discharged bank from pulling down the other when the charging source is not active.

This model is rated for up to 130 amps and uses gold-plated terminals to support reliable, corrosion-conscious high-current connections. The design is intended to improve charging efficiency compared with older isolation methods while giving dual-alternator systems a dedicated way to manage two batteries or battery banks.

Battery isolators are especially useful on boats with separate starting and house banks, where preserving starting reserve is important even when accessories have heavily discharged the house battery. Correct cable sizing, terminal protection, alternator output, and battery-bank configuration should all be verified before installation. For dual-alternator systems requiring up to 130A of isolated charging distribution, this ProMariner unit provides a straightforward marine-ready solution. More options in our battery isolators & charging relays.