Dual Pro B.O.S. 12V Three-Bank Battery Balancer

Three 12V batteries operating in series can become unevenly charged as the system ages or individual batteries carry different demands. The Dual Pro B.O.S. three-bank optimizer is intended to balance those batteries by transferring energy between them. Its purpose is to keep the series pack closer to an even state rather than to replace the charger. This configuration is particularly relevant to larger trolling motor battery arrangements.

The unit employs the BSAP-24 selection algorithm to identify where energy transfer is needed. The manufacturer specifies transfers up to 7.5 amps and a sleep-mode draw under one milliamp. Because the system is self-powered, its function does not depend on a separate external balancing supply. Balancing takes place before, during and after charging.

An uneven pack can be limited by the battery with the least available charge. A balancing device addresses that distribution issue, although battery condition and correct charging remain important. This model is intended for three 12V banks rather than the two-bank version. Explore battery management products for related electrical system components.

• Balancing for three series-connected batteries
• Energy transfer helps reduce voltage imbalance
• Self-powered operation between charging cycles
• Low standby current for installed systems