If you have a boat with just one battery its wise to add a second battery to the boat giving you twice as much battery capacity in case for instance you inadvertently drain a battery with the stereo while the engine is off. Both components are designed to withstand a life on the water.
Details About Blue Sea Boat Marine 7649 Mini Add A Battery Kit For Most Outboards
Add a battery boat. The blue sea system add a battery kit packages a switch and an automatic charging relay acr to help protect and maintain the additions to your boat. The add a battery is a simple approach that helps keep you and your boat safe. The kit allows you to charge your new and existing battery from a single charging source. The intention is to keep the starting battery reserved for starting. The add a battery is as simple to operate as an on off switch yet effectively manages the switching and charging of two batteries from a single charge source the add a battery includes a dual circuit plus battery switch and an automatic charging relay. These components simplify switching and automate charging so that all you have to do is turn the battery switch on when you board and off when you leave.
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. 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. The switch turns on both the starting and house battery simultaneously but keeps them separate from each other. The battery drain will equalize if your draining both at the same time. Only switch both on 12 when the boat is running so they charge but when using it for the radio or accessories choose only one. All you need now is some space a few basic tools a little knowledge and another battery.
If your boat came from the factory with only one battery or with two batteries of inadequate size consider installing a second battery bank. But if you have a bad battery that is drained or doesnt hold a charge it will drain the other. Blue sea systems add a battery this add a battery kit is designed to facilitate adding a dedicated starting battery to any vehicle or boat. The add a battery includes a dual circuit plus battery switch and an automatic charging relay.