Pick the best battery switch for your boat. The next day switch the battery switch to the 2 position and run the boat.

Add A Battery Dual Circuit System
Dual boat battery setup. Install your battery switch in an easy to reach location near the battery installation. Install the second battery to the boat. Dual battery setup utilising the old kiss theory for your boats dual battery setup guarantees the elimination of those mysterious drains in your boat wiring system that can cause dead batteries while youre not using your boat. Use the hardware that comes with the switch to insure proper connections. Widely used for car marine boat rv camper truck atv utv battery banks and other devices. They allow selection between batteries for starting and charging or operation of both batteries in parallel.
Mount the switch directly to the hull inside the engine compartment. 3 speed swith easy to install and durable to use. Be sure to. 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 on board battery charger. Connect the positive red port from the engine battery to the number 1 position on the switch. This alternating of the batteries daily will ensure both batterys get excersized and periodically charged.
Choose a marine battery that meets the engine specs. Most boats with dual battery systems use one starting battery and one deep cycle battery. Blue sea two battery switch acr dual charging system. Two battery boat setup with wiring diagram. This dual battery setup for boats uses the blue sea add a battery kit for. Can be used with two or more batteries and single or dual engine systems.
The traditional dual battery setup lets you choose which of your batteries are used or charged. How to install a marine dual battery setup for your boat 1. The typical battery management scenario consists of placing the dual battery switch in the 1 position and running the boat for the day. Make sure the dual battery switch is designed for two batteries some are. Dual purpose batteries work well in some applications and are a good compromise because they tolerate deep discharges that would ruin a typical starting battery.