Blue Sea 11003 HD-Series Battery Switch w/Alternator Field Disconnect - 3-Position

The Blue Sea 11003 HD-Series Battery Switch with Alternator Field Disconnect is an essential marine electrical control system designed for serious boaters, anglers, and cruisers who require reliable power management during extended time on the water. This heavy-duty switch is built to withstand demanding offshore and coastal conditions, ensuring that your vessel's charging system remains protected against catastrophic failures.

Featuring a dedicated alternator field disconnect function, this 3-position switch (Off, 1, Both) allows users to isolate individual battery banks or combine them for maximum starting amperage. The switch is constructed with marine-grade contacts and is sealed against salt spray, making it capable of handling the electrical loads of modern marine engines and navigation electronics without risk of voltage drop or switch failure.

Ideal for serious boaters operating dual-bank systems or requiring auxiliary power for high-draw devices, the Blue Sea 11003 is engineered for bulkhead installations, fitting seamlessly into standard setups without taking up valuable space. This switch is a critical component for anyone looking to ensure reliable power management on their vessel.