On Nov 25, 12:23*pm, "Eisboch" wrote:
"Tim" wrote in message

...

OR, once can charge 2-12v batteries independantly, even though hooked
together in series. and the more I think about it this is probably
what's happening.

red/black one battery, red/black other battery, *red, black 20a
breaker to alternator output, and black to engine ground.

I think you're right. * *That* makes sense and explains the "For 24v
systems" *statement.

Eisboch

just being able to post when I can, but i think it goes even further
than that. I believe that the mfj, is talking about more than just a
24v system. Like 3 batteries. One main or engine battery, and two
seperate hooked into series.

Super easy to hook up. one set of blk/red leads goes to the main
battery seeing it is already enforced by the charging system, while
the other two sets go to the respective batteries in the 24v series.
Therefore you have current going to your 12v main as well as your
series set. So when your trolling motor batteries get low, you still
have an engine battery that is uneffected by drain.

Pretty simple, actually.