I came across this recently and was wondering if it is any good. Seems to make sense for boondocking, since it is 12v (and fairly lightweight for roof mounting). Perhaps it does not cool as well as a 120v unit, but if it cut humidity and dropped the temp a few degrees, it might be worthwhile. Both the DC4400 and DC9000 look promising.
http://www.dcairco.com/products.html
