Have lots of solar? Sharp has an A/C for you

Compared to ammonia efficiency freon is a joke. But fluorocarbons tend to lubricate, ammonia tends to irritate seals and gaskets. A three hundred watt ammonia unit would transfer more BTU than a 700 watt freon A/C. I tend to stay in whatever section of the rig I choose to stay in. I don't run from end to end. 10.7 EER LG window units work great at the expense of the interior space they rob. I insulated the bedroom door and the rig had closed cell foam shot into the ceiling and walls (overhead and bulkheads) The Crown has 2" space clearance so twenty gallons of foam were misused in treating the rig. Don't forget the deck and the front end. I ran 1-1/2" tubing for the electrical from the front to the mid bay engine then to the generator (space) and batteries. Spare six gauge 12, 18 and six conductor 18-gauge wires just in case. Then there is the 2" liquid-tite tubing running under the chassis. It too has tons of spare wires.

Saving 10% on energy conversion loss interests me. But I know intuitively what's coming regarding specialty construction pricing. That does not interest me. A powerful DC BRUSHLESS motor? I doan theeng so...

That's really nothing new. Big companies like Mitsubishi have been using it for years in their high efficiency heat pumps. They call it "Inverter technology" :R

DC or AC, it's still going to require a lot of power.