I think Caterpillar is just a tad more intelligent than RV manufacturers, plus the YSB all wrapped up in a ball. I modified my first cabover camper "Kamp King" forty nine years ago. There is absolutely no advantage in breaking the positive side of a battery circuit*. I've seen many a commercial fishing vessel blow a foot wide hole in a 5/16" hull when the 32 volt system decided to make love to the "ground". The YSB is like the FAA, they are mired just as deep as the BCI.
*Or please be nice to me and whisper in my ear "why"
