Originally Posted by Stu Jackson
You already "GOT IT!" I had to figure it out back in 1998 before someone invented the Echo Charger
. Our combiner works just great. The "trick" is for folks to understand the difference between the 1-2-B switch as a USE only vs Use and Charging
It's pretty simple once you draw a wiring
The way that I posted is the way that I used to wire boats when I worked in a marina back in the early 1980's. Everybody seemed happy with it back then. Once both batteries are charged, you just set the switch to 1 & forget about it for a month or two unless you run into a dead battery issue on #1 for some reason, then switching to #2 saves your bacon. The only hassle is that you really should charge #2 every month or two just to be sure that it is topped up if (when) you need it. This can be done by switching to both while running, or by using an external charger
of whatever type you like, or having some sort of automatic dual charge or diode system. Nobody, at the marina where I worked, ever seemed to want to spend the extra money
on the fancy automatic stuff, but that's just the particular crowd that I was dealing with at the time.