Yes, I may have missed the inverter-only AC side of the reasoning behind the 30 amp lead breaker in the second box, Ed. I was coming off Gerald's idea that no such animal would be needed, and probably didn't word my concept exactly right. Such a second 30 amp breaker protects the inverter against multiple circuits overtaxing it all at once when its inverting.
I also agree that Gary should be careful here, given the options available for breakers, and thanks for noticing that he'd already obtained a 240v one to put in a 120v application; as Gary's own inverter installation diagram shows, that is to be a single pole 120v main breaker. Ditto for my suggestion regarding GFCI breakers, as the link I supplied to Lowe's was only meant as an example. Further perusal of that site will reveal multiple possibilities at many price points. Gary needs to be sure of getting the appropriate devices, whether using built-in GFCI breakers or the less expensive regular ones backed up with downstream GFCI outlets.
My other concern is that both circuits fed by the inverter have 20 amp capable wiring and not 15 amp somewhere. Perhaps I missed something in a prior post where he alluded to their wire size, he has matched them accordingly, and all is well in that dept.
I for one would feel most comfortable at the very least paying for an onsite consult with a licensed electrician familiar with RV applications, Gary. It might expedite getting your Mrs. back home again to her nice (and safe) Beaver coach.
Joel