well, it's not about the noise, or the size of the unit, it's about the voltage to run it. I wanted to cool at 12v dc. (someone here said that it was impossible, so they leave me with no choice but to do it. ;-) Now I agree that it must stay dry or you'll short out the peltier(s). Any cooling process must condense moisture. May have to put a layer of duct tape with caulk rim in there, for the cooling phase. One thing I am going to attempt that no one else here is doing yet, since I have the "house like" trailer, is to put in a water heating system in the roof rafters, inside the roof, under the shingles, under the particle board, in the ceiling. What this does is two fold, one, I get boiling hot water on summer days. (MAYBE luke warm in winter, but I doubt it. winter unit for next winter.) The other thing it does for me is to absorb a HUGE proportion of the radiant heat BEFORE it gets to my insulation, inbound. (I may go multi-layer for the foam sheets. I have 3.5 inches to work with as that is my roof joist depth, 2x4's (1.5's x 3.5's) For the winter I have been heating with a 200 watt hair dryer (forced air) and a 500w halogen work light (infrared heating.) 80F inside with 20F outside. So I'm pretty well insulated from the wind and cold. In the summer I am going to re-open the soffits/eaves (sp, under the roof edge) which I closed for the winter work, with foam. Too windy in the winter, but not nearly enough for the summer. So we'll see. Solar panel and/or windmill for 12v power. All I can say for sure is that I will have hot water in the summer. I don't know how small I can get away with for the hose, but it may end up pushing boiling. I may end up boiling all my water trying to keep the interior cool. (Hmmm, maybe a steam generator... LOL!) Maybe instead of a solar panel I'll go with a peltier panel on the roof. Should be 20F diff. between sides in the sun. It's a thought. I was saving the AC looking box on my tongue to be a battery box that looks like an AC unit... (maybe I'll end up with an AC unit that looks like a hedge...)
Another thing I have seen is to have a tub of ice with coils of metal hose, then bring that to a fan and metal coils, to AC something. You'd melt the ice, but it might be a two bag a day cooling system. I could go "no 110" as long as I have the ice and the 12 volt source for the pump and the fans (muffin: computer 3W@12v dc)
@Shadow Catcher, you are right about one thing. I'm 93.35 cu ft, interior, or about 19 times the volume of a cooler. So even if I do get that many peltier plates together I still have to power them... hmmm. I hope it's a really windy day and I windmill a 100 amp alternator. LOL that would give me 5 amps per peltier, and 5 amps left for fans. Maybe at the beach... otherwise I better pray for shade, or full tarp.