The Mastervolt BI 1203-S is a high-quality 3-output battery isolator used in 12/24 V systems to charge batteries separately. It sequences the current from an alternator and/or battery charger to charge batteries without connecting them together.
Isolating the charge current prevents hazardous situations; for example, the battery feeding the bow thruster can operate independently of the battery feeding the lighting. Energy loss in current distribution is minimized, and the unit is compatible with Mastervolt alternators and chargers.
Our expert team is available to assist with correctly isolating your battery banks and managing charge current.Feel free to reach out with any questions — let's plan your installation together.
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