Rooftop AC units run on 110v AC.
If you got an 120 v generator you can run them when you're driving.
They require 15+ AMPS so you would need about ten 12v automotive deep
cycle batteries to run one through an inverter
http://williamwareagency.com/forsale/stanvan/ac_unit.htm
Dirt simple 120v AC solution.

Stan Wilder

On Sun, 24 Mar 2002 10:40:54 -0500 Scott Walker <s_walker@MINDSPRING.COM>
writes:
> This is my idea for a roof mount air conditioner.  It is still months
> and
> dollars away from happening, but I would be interested in any
> ideas/criticism.
>
> Standard window unit mounted in the luggage tray with duct work
> going either
> through the roof for use with the roof popped or not, or just
> flexible
> ducting that could be used through the window on the pop top.  Could
> even be
> used with one of the aero luggage tray covers that have been
> recently
> discussed.  Could be used with a good sized inverter for mobile
> use.
>
> I was told that the RV style roof mount units run on 24VDC....any
> truth to
> this?
>
> Scott
>
> Augusta, GA
> too many projects to list
>

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