Bluewater 300A Dual-Circuit Marine Battery Switch

The Bluewater dual-circuit battery switch lets one operator action control two electrically isolated onboard circuits at the same time. That arrangement is useful when engine and house systems need to remain separated during normal operation while still being controlled from one switch location. The design is suited to marine and RV power systems and is ignition protected for appropriate gasoline-powered vessel installations. Its tactile knob surface helps the operator recognize switch position even when the surrounding compartment or panel is poorly lit.

The current path uses 3/8-16 tin-plated copper studs that accept both 3/8 in and M10 ring terminals. Extended stud length provides room for multiple correctly installed cable lugs when the wiring plan requires more than one connection at a terminal. Marine-grade non-corrosive metal components are used for durability around moisture and vibration. International ON/OFF legends and an icon label set are included to help the installer identify the finished circuits clearly.

• Simultaneous control of two isolated power circuits
• Useful for separating engine and house electrical systems
• 3/8-16 tin-plated copper terminal studs
• Includes legends and circuit-identification icons

Choose a mounting location that keeps the switch accessible while allowing heavy cables to be supported and routed without sharp bends. Proper conductor sizing, lug installation, and circuit protection remain essential even when both banks are controlled from the same device. For other battery isolation and onboard power-management components, browse Battery Switches.