Came across another Barth in my CC RV storage yard..amazing.. he was trying to figure out which bank of batteries was for the chassis and which for the house..

one big batt vs 2 smaller ones..He wanted to stick a tender on the chassis side.. Cummins on a Spartan Chassis..

here's the pic..



his handle on BM.com is SoCal Barth..

Most likely the two smaller group 31 batteries are the engine starting batteries. I would trace the cables or disconnect one side at a time to see what it powers.

I would second that motion. The cables on the two 31s are made with inline connections for parallel use. Large gauge and just like the starter cables on my 31s.

Several smaller cables on the 8D, probably the coach battery.

Wow, Looks like at least 3 battery cables connect to the 8d positive post and also a knife disconnect switch on that post. Guess he didn't want to put it out there in the open on the negative post.

That battery also looks a little narrow to be an 8D wonder if it is 6D or 4D. Would be very unusual but it just looks narrow to me.

Nick

The large fuse would also be a give away of the house batteries. I can’t see where the wires go but that would not be on the starting batteries.