Isolates your battery banks to prevent accidental discharge of starting bank

These Dual Circuit Plus switches isolate your Start and House battery circuits, preventing accidental discharge of the Starting bank and protecting your electronics from engine starting sags and spikes. Ideal when combined with an Automatic Charging Relay, which will automate charging while the Dual Circuit Plus will simplify the switching. This switch allows you to combine two battery banks in the ON position using a simple three-position On–OFF–Combine Batteries switch. The Combine Batteries position allows you to cross-connect your battery banks in the event of a weak Start battery.

Capable of 300 Amperes continuous rating per circuit, these switches have a total current-carrying capacity of 1000 Amperes. And, because they are UL Listed, you can be confident that they safely handle these high amperages. Ignition-protected, safe for use aboard gas-powered boats, and meets all ABYC battery switch standards. Long 0.870" studs accept up to 4/0 cables. Case design allows surface or rear panel mounting. The e-Series switch fits all Perko and Guest low amperage battery switch hole patterns. The m-Series mini switch is perfect for outboard and small inboard powered boats. Tactile textures on the face for knob position awareness by feel only.

• Number of Positions: Three
• Alt. Field Disc: No
• Continuous Amps: 300A
• Switch Material: Reinforced Polycarbonate
• Terminal Material and Size: Tin-plated copper, 3/8" (10mm)
• Approvals: UL Listed. Meets UL 1500, SAE J1171, CE
• Warranty: Five years

Product Specs

The West Advisor

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.