Make sure when you add the switch that you install it in the on position. Adding a second battery to the boat.

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How to install a battery disconnect switch on a boat. Mark davies 382506 views. Install the cable from the out common terminal of the switch to the point on the solenoid or starter where the original positive cable from the main battery was attached. Nature reliance recommended for you. Step 5 reconnect terminal. Dual battery switch stop parasitic power loss on boat. Wire it in between the cable and the battery terminal so that the switch will break the connection to the battery when it is off.
In this video ash will guide you through the setup of a basic 12v battery system in your boat from finding a home for your battery to wiring up and installing an isolator switch. Automotive battery disconnect switches duration. After you have removed the terminal you can now install the switch. Make sure the dual battery switch is designed for two batteries some are onoff switches and will handle the amperage when starting the engine. How to wire a boat switch panel duration. A rating of 250 amps continuous is sufficient for most outboards and gasoline inboards.
You can also buy switches with locks for security against boat theft and some have field disconnect circuits to protect the alternator in case you turn the batteries off while the engine is running. Top five useful knots for camping survival hiking and more duration. Step 12 attach the ground cable for the secondary battery to the battery and the chassis ground.