Chris - it seems obvious to me that you and Doug are beating your head (s) against a wall here. Perhaps you folks have better things to do than argue...probably.
I must concur with 8yxm. the batts should not be 'off line' unless the rig is in long term storage. His comment about letting the Progressive Dyamics being left alone to do their job is most appropriate.
After reading & digesting this info, one thing becomes evident - you need to zip right out of that shop. Go to your local neighborhood NAPA and get a recommendation for a repair facility. The longer you stay in that shop you are in, the more likely...
Just had a similar situation...no 120v to the coach. Found that you cannot reset a GFI outlet unless it has power supplied. Once I reset the popped breaker, (which did not appear popped at all, but was) then I could reset the GFI and away we go! St...