Boat 2 Battery Setup

To add a second deep cycle battery for additional power with two batteries and a 1 2 all two bank manual switch already installed in your boat you have all the basics in place to add as much battery power as you want.

Boat 2 battery setup. Use the hardware that comes with the switch to insure proper connections. Pick the best battery switch for your boat. Mount the switch directly to the hull inside the engine compartment. I allows your house and start battery to remain isolated except for emergency conditions.

Boats often need two banks to have a reserve bank to be sure the engine will start or to have a large house bank so you can run bigger dc loads for longer time periods. This is about as simple as it gets and is an effective setup. To join batteries in parallel use a jumper wire to connect both the positive terminals and another jumper wire to connect both the negative terminals of both batteries to each other. Proper battery management including switching and charging is essential for safe and reliable operation.

A double pole on off combine battery switch like this one is a great choice for a single engine two battery boat wiring system. Negative to negative and positive to positive. Connect the positive red port from the engine battery to the number 1 position on the switch. If your boat came from the factory with only one battery or with two batteries of inadequate size consider installing a second battery bank.

Choose a marine battery that meets the engine specs. Install your battery switch in an easy to reach location near the battery installation. In this video i go over dual boat batteries with a battery selector switch electric trolling motor systems and how to wire and install them along with an o. Used to shutoff everything and prevent trickle charges from draining your battery view our battery switches.

Install the second battery to the boat. Batteries are at the heart of the electrical systems found on any boat or vehicle. How to install a marine dual battery setup for your boat 1. The following basic wiring diagrams show how batteries battery switches and automatic charging relays are wired together from a simple single battery.

You can connect your load to one of the batteries and it will drain both equally. Make sure the dual battery switch is designed for two batteries some are. The next day switch the battery switch to the 2 position and run the boat.