So, I boxed in the AC and cut a hole in the side of the trailer for the condenser intake. Pics are mirro images because my rear facing camera is broken on my camera.
The AC is primarily for the dog so we can leave him in the trailer while we go to lunch in town when it is hot. Therefore, it HAS to work without being plugged in to shore power. The math looked decent, but the real world is everything....
Result: in full shade with zero power input, the AC cooled the trailer from 75° to 65° in 20 minutes and it used 7% of the battery at about 40 to 42 12v DC amps on high. So, if it is sunny, the pup could hang out inside all day if necessary as long as we aren't trying to cool down more than 30°. We charge at about 31 amps in full sun. Bottom line = it works and works WELL. Probably as important is that the AC cost like 65 bucks on marketplace and not $2k like a DC unit.
What is that adjustment vent, you ask? It will become the duct for the diesel heater I don't have yet. I will just sit the heater on the rock slider and run the hose through the AC intake 🕳. That's a fall project to complete. I only need heat when it is below freezing.