Quattrohead
Solar Wizard
A window unit for a car, fabulous !!!!You could look for a 48VDC car air conditioner and see about wiring something like that up? This one is ~$940, but the same model (DV1930E-AC) is available from a bunch of places and you could probably find it for cheaper:
RIGID Micro DC Aircon - Built for Smallest Space Cooling.
RIGID Micro DC Aircon - Built for superior comfort.www.rigidhvac.com