charging

Greetings - I have a 22ft LS with two foward fishing seats. In each front corner are pre-wired battery spot. With one have a large round 4-pin female outlet. Here's what I want to do; - install a 12 volt battery in each station - wire them in parallel - isolate them from main starter battery...

I have been doing extensive research in preparation to install a 2nd battery(house battery) and I see most people buy the add-a-battery kit from Blue Seas or use a combination of just a combiner or just a switch. I just found some information that Yamaha 150's and above after 2003 have an...