Thanks this is excellent information. Two things.
1) I haven't purchased yet so, if buy as designed and later find out reserve capacity is inadequate, I am fairly certain the RV Dealer will not have any incentive to help me with the cost. On the other hand since unit is brand new, if I get enough to confirm my thinking that fundamentally the intent of current design is theoretically flawed as they have basically added a Residential refrigerator, I can draw a hard line they they upgrade the batteries before I purchase. My intent here is to make sure that what I may be demanded as practical merit? I did talk with Worldwide Battery who suggested I asked EV Dealer to upgrade with 2 new Group 31 12 v with 225 AH each.
2) On Generator noise. This unit has the Onan 5.5KW. How much louder is it over the 4000 KW? My hearing is already bad, and wonder if this upgrade will come back to haunt me?