I had a switch that connected the two battery systems together so that I could charge one with the other, but this wasn’t an ideal system because the coronet battery is lead-acid and the RV battery was lithium. They run at two different voltages and the wire between them was just a long #12AWG through some switches, so I’m not sure how effective they were.
I was watching the Humble Road van building Youtube channel where he installed this unit and it seems like exactly what I needed. So I re-arranged the services area and ran some #6 AWG wire between everything so that the lithium batteries will charge properly while we’re driving automatically. I re-used the existing switch in the dash console so that I can turn it off if I want.
