Blue Sea 8686 Dual-Battery m-Series, Dual Circuit Plus

The Blue Sea 8686 Dual-Battery m-Series, Dual Circuit Plus is a professional-grade battery management system designed for vehicles that require redundant electrical power and isolated charging circuits. This product is ideal for overlanders, RV enthusiasts, and work trucks, ensuring reliable starts for the primary engine battery while allowing the auxiliary battery system to power accessories independently.

Utilizing Blue Sea's proven VSR (Voltage Sensitive Relay) technology, the m-Series Dual Circuit Plus automatically isolates and charges secondary batteries based on engine voltage. This feature helps eliminate parasitic drain and prevents accidental starter discharge. Its dual-circuit design allows for independent loads on separate battery banks, making it essential for vehicles that operate compressors, winches, or 12V refrigeration alongside critical vehicle systems.

The compact dimensions and lightweight design of the Blue Sea 8686 make it suitable for installation in tight spaces, such as engine bays or under seats. This product is particularly beneficial for expedition vehicles, emergency service rigs, agricultural equipment, and marine applications where reliable power delivery is crucial.