Update on your build?Well the verdict is in and so far I'm really liking this AC unit. It's surprisingly efficient, quiet, and very compact. I ran it for an hour with thermostat set at 70 degrees with an initial camper temp of 85 and was averaging 350 watts per hour. Outside temp was only 87 so that's probably on the low end of what to expect.
Here's a video of the install including a refrigerant charge and realtime energy use numbers.