Blue Sea 3002 HD-Series Battery Switch Selector

The Blue Sea 3002 HD-Series Battery Switch Selector is a heavy-duty multi-battery management solution designed for serious vehicle builds, marine systems, and off-road applications where electrical redundancy and load management are essential. This selector switch provides manual control over battery isolation and parallel configuration, making it ideal for wiring dual batteries in overlanding rigs, RVs, marine vessels, and specialty vehicles with auxiliary power demands.

Engineered by Blue Sea Systems, a trusted manufacturer of marine and automotive electrical components, the 3002 features a robust mechanical rotary design with four distinct positions: Off (both batteries isolated), Battery 1 Only, Battery 2 Only, and Both Batteries (parallel charging mode). This design prevents accidental shorts and ground loops while allowing deliberate battery selection for starting or auxiliary circuits. Heavy-duty contacts and a sealed internal mechanism ensure corrosion resistance and long service life in challenging environments.

The compact footprint and lightweight construction make it easy to mount under the dash, in engine bays, or inside battery boxes without compromising space or weight budgets on modified vehicles. Professionals and enthusiasts alike will benefit from the reliability and performance of the Blue Sea 3002, which is compatible with both 12V and 24V systems, ensuring versatility across various applications.