ProMariner 70A Single Alternator 2-Battery Isolator

Description

The ProMariner 70A Single Alternator 2-Battery Isolator provides isolated charging for two battery banks from one alternator. It is well suited to smaller marine electrical systems with separate starting and accessory batteries, allowing both banks to receive charging current without being permanently connected together.

The isolator is rated for up to 70 amps and uses gold-plated terminals for dependable high-current connections. By keeping the battery banks electrically separated, a heavily discharged house or accessory bank is less likely to pull down the starting battery after alternator charging stops.

Installation should be matched to the alternator’s output and the electrical demands of the vessel, with correctly sized battery cable, secure terminal protection, and appropriate circuit protection. Because an isolator distributes available charging current rather than creating additional alternator capacity, battery-bank size and alternator performance should be considered together.

For compact two-bank systems that need a simple 70A charging-isolation solution, this ProMariner unit provides a practical way to protect starting reserve while charging both batteries from one alternator. See the rest of our battery isolators & charging relays.