Short question: should I connect my new wire from the converter to the battery cutoff switch, or should I connect it directly to the battery control center?
Longer version:
I'm upgrading the wiring between my converter and my batteries. In my 2013 Sunseeker 3170 DS these connections are through 6 gauge wire. The positive goes from the converter to the fuse panel under the bed to the battery cutoff switch, to the battery control center box ("BCC"), to the batteries. (see this old post if you like awesome diagrams:
http://www.forestriverforums.com/for...ing-57498.html Thanks Snowman9000!)
I'm replacing that wire run with a new 2 gauge wire. I can't run it through the fuse panel under the bed like the OEM wire because that panel can't handle anything bigger than the existing 6 gauge wire. Consequently, I'm running it directly from the converter to the stepwell area where the battery cutoff switch and the battery control center are.
I can replicate the functionality of the OEM system by connecting my new wire to the battery cutoff switch and leaving the 6 gauge wire that feeds back to the fuse panel. It's a little more hassle to get the wire to the switch - have to feed it back inside the coach to get there and then run a new 2 gauge wire from the switch to the battery controller - but not a big deal.
I've read a few times on the forums that newer Sunseekers and Foresters changed the way the converter was wired. The change is described as allowing the converter to charge the batteries even when the cutoff switch is in the off position. This leads me to believe that in newer motorhomes, the converter is wired directly to the battery control center, which then feeds power from the converter directly to the batteries and power to the 12 volt loads in the coach back through the cutoff switch to the fuse panel.
From a functional standpoint, in my existing system, if the battery cutoff switch is turned off and the converter is attached to shore power, most 12 volt loads (interior lights, TV's, propane/CO monitor etc.) will operate but the batteries will not charge. If I connect my new wire directly to the BCC, the battery cutoff switch will turn off the 12 volt loads when attached to shore power, but allow battery charging.
My question is this: Should I replicate the existing system by running my new wire to the cutoff switch, or should I emulate how (I think) newer models of my rig are wired and run the wire directly to the BCC? From a functional standpoint, while on shore power do I want the battery cutoff switch to control charging of the battery or do I want the switch to control 12 volt loads?
Right now, I think I'm more likely to want to charge the battery and turn off the interior 12V loads. Someone please talk me out of attaching my new wire directly to the BCC if that's a bad idea.