If you have a boat with just one battery ... utilize the What Circuit Wizard and Wire Sizer apps available on your smartphone. Make sure the dual battery switch is designed for two batteries (some are ...

See All 16 Photos There are several ways to create a functional dual-battery system. One is a simple setup with a boat-style switch, a nautical battery selector that lets you choose either battery ...

Choose the appropriate-size stainless-steel hardware to securely install the SmartShunt sensor. Connect the negative battery terminal to the M10 bolt on the “battery minus” side of the SmartShunt ...