> We're using a second, deep-cycle 72-amp hour battery (dedicated to the
> a/c -- we're not using the Vanagon car battery) which at 100 amps provides
a
> cycle of 7.2 hours of continuous draw before requiring charging.

Not *completely stupid*, just got happy with the "0" key -- that's a
*10-amp* load, of course, for a 7.2 hour cycle...not 100-amp load!!