I don't know if I want to go with a "full config" to begin with. Might just start with a couple batteries and panels. Are you using solar to charge the hitch batteries? Does this conflict with the alternator charging or the charger I assume is under the oven?
Sorry for the intrusion, but I am very interested in your Actic Fox solar build project. I have a 22GQ which would have the same roof as yours. I am trying to figure out how you got so many solar panels on the roof for the 780W power? I calculated I could get 5-6 3' panels down the left side and perhaps another one to the right on the front for around 700W.
Also, you obviously were'n't able to use the "solar ready" feature of the trailer as the gauge is so small for the factory wiring. I am guessing you made yet another holes to bring the wires down? Did you do that through the front wardrobe?
Sounded like you have the sit and sleep option as you mentioned couch. I have the Queen bed version but the front cupboards and understorage is similar.