If your boat came from the factory with only one battery or with two batteries of inadequate size consider installing a second battery bank.
Boat two battery setup.
The both setting might be used when you are running your engine and want to charge both batteries from the alternator or if you need to parallel the batteries in an emergency to help start your engine if your start battery becomes too depleted.
Having a dedicated starting battery and a dedicated house battery to run extra appliances with the engine off means you can party anchored on the water for hours without risking killing your battery and not starting again.
This is the best way to make sure that your.
This dual battery setup for boats uses the blue sea add a.
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.
But a 1 2 both marine battery switch also allows you to parallel both batteries.
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.
Blue sea two battery switch acr dual charging system.
Installing a second battery in your boat adds many extra hours away from land.
All you need now is some space a few basic tools a little knowledge and another battery.
By tom burden last updated 6 1 2020.