Anyone know how to do this?
I have a 12V 80amp Lithium battery I would like to as a "house battery" and wired in to the system along with the cranking battery. I know I will need a special switch but have no idea how to accomplish this. What all goes on the house battery and does the cranking battery only have the outboard cable on it? And how is it all tied into the main ON/OFF switch in our boats??