You're welcome! Your work and supporting documentation is a positive addition!
With the DC-DC charger, and an increase in Ah storage, you can make running your TV sitting at a campsite or running a generator quite unnecessary. Nobody likes hearing a generator anyway, so just give it away to some poor soul still running lead acid batteries! 🤣
Rooftop solar; it's nice having them up there. When parked outside the rooftop solar runs our day-to-day needs. Perhaps a good addition for the future to-do list. When you do so, please do not drill mounting holes! You only need 1-2 holes for the wiring with a dab of Dicor to seal them. The standard 1x3” Renogy solar panel mounting brackets can be mounted to fiberglass using only a 3” strip of 3M VHB tape (2x stronger than screws in fiberglass).
Smart to replace your A/C ASAP if you've been listening to that ROCK CONCERT known as the Dometic Penguin II A/C! 🤣 If you're camping in the hot & humid SE, even in the shoulder seasons, you will need to up your 400 Ah storage to run an efficient inverter or variable speed A/C unplugged.
Yesterday was 98F up here at 5400 ft and was 116F in the desert valley below. I have a Ruuvi sensor on the roof of our Oliver, under the solar panels, which reported 115F with 16% RH at 1PM. It’s a “dry heat” but only in the shade, LOL! You could cook eggs on top of the solar panels! We don't go to The Valley in the summer months! Up here after dinner it will be in the 70s, high of 98F, low of 68F. Of course at low altitude where it's humid it doesn't cool down as much at night.
The Chill Cube cooled our cabin down to 76F all day long, got to its set temp of 74F once the sun set, and for 24 hours we used only 220 Ah in battery storage. Extremely bright sun supplied another +/- 160 Ah by solar charger all day long. Think that the Orion XS 50A can add equal Ahs in 4 hours towing vs. all day long with 320W rooftop solar.
I could not imagine all this 2 years ago when I started working our mods! Now that you have a proper DC-DC charger, my suggestion is more Ah storage capacity. You should have room to add more of the same batteries and if you need to, remove the tray. 😎