Cateye,
Did you see my post on the Parallax controllers - it's under the electric jack thread. I was in our TM tonight connecting the shore power to run the frig. I noticed that the voltage out of the Parallax 7345 without the T option was 13.8 volts.
http://www.parallaxpower.com/7300/7300pwrcntr.pdf
With the T option it would start out at 14 volts before dropping to the nominal voltage after 15 hours. Good if you need to re-chare quickly. Not necessary if you're normally plugged into shore power.
The solar panels keep our batteries fully charged between trips.
Let us know how you make out. Ray