I've been researching off grid AC systems....and thinking there ain't much for desert living, other than a swamp cooler...and this is what I found.
"Mini Split" systems with the INVERTER compressors seems to be the deal....very popular for many years in the Far East, and Europe...and developing countries....but pretty much unheard of here in the US. Maybe due to AC manufacturers, AC svc companies and elect power companies not wanting this techno to become widespread in the land of the Consumers?
Checking around online for the best deals and what other folks have installed for off-grid...this is what I ended up buying. "Overstocked" Fedders mini splits for pretty cheap. There are plenty of Ching Chong versions a tad cheaper ...but this was Fedders...still China made. For some reason I thought this was better, but the price seemed okay, considering the22 SEER rating, at $750 plus the "line set" (copper lines) and then you gotta add the elect power line and a wire for the control to tell the condenser what to do. My former A/C repair tech son was in town so got him to do the install.......and took about an hour.
He is a certified AC Tech...so he has the tools and knows what he's doing...unlike ME.....who knows Nada.
This thing is a 22 SEER rating...and has Heat Pump as well...but that heat pump spins the elect meter just like the AC....but most folks don't realize that. (we have propane in winter for heat)
It does seem pricey for a 1 ton AC... compared to a good window unit....and I did get a free installation...only way to get warranteed is certified installer doing the job. But the super efficiency unit at 22SEER and with elect prices steadily going up......makes good sense.
I planned to get a 9K unit for the cabin....but guess what.....they are SOLD OUT of these "overstocked" 22 SEER Fedders Mini splits.
A standard AC unit is only "on or off" for the compressor...but these units are somewhat variable in the compressor speeds that match to what the thermostat temp setting demands.
Website is called "alpine home air"...or something like that.....free shipping and no tax. But Cust Svc sucks a bit.