It would have to be a helluva inverter.  Those puppies draw 20 amps at 120v...
 Inverter would have to draw 200 amps at 12v assuming 100% effeciency.  Gonna
take a BIG alternator!  (or a 3.5kw Onan in the back.) ;o)

Jim Arnott
WetWesties
Union, OR

CHRIS STANN wrote:
>
> Tom,
>
> In order to install an RV A/C unit you would need to cut a 'standard'
> 14''x14'' opening to mount the A/C.  It would not fit on the luggage rack up
> front, so you would have to mount it on the pop-top.  The lightest unit I
> was able to find was 87 LB and could conceivably run on an inverter while
> the van was in motion.  I found this out when I was considering purchasing
> an air-cooled Westfalia and wanted to minimize the drag on the motor while
> still using A/C.
>
> I think you are better off using a small home window A/C unit in the
> driver's window, while camping only, and block off the open space using
> plywood.
>
> Chris.