I have two six volt batteries in the original under steps location. Wired in parallel to them is another pair in a storage compartment on the other side of the coach. To this added battery pair connected is my solar controller and whole coach inverter (shore cable, in adjacent compartment, plugs into the inverter).
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.