I too have a 28ft CCD mine is a 2004. This was the first winter that we stored the trailer somewhere other than in the Driveway, with it in the drive way we kept it hooked to shore power. This winter we left it up north and because of that we pulled the batteries, so they would not freeze. Well over easter we went up for the weekend, I reinstalled the batteris and switched the store/use switch to use. We noticed nothing wrong, and had a good weekend hooked to shore power. Well this weekend we went up again this time to bring the trailer home getting ready for Shakedown. When we arrived on site I was not able to get any of the lights to work from the Battary power, I tried the Store / use switch several times with no results. I then hooked to shore power and everything appeared to work. I broke out the manuals and think I found the problem. Tucked up under the front sofa(just out of reach) is the Relay that the store/use switch controls. When in the store posistion the battaris are completely disconnected from the electrical circuit. Therefore no lights with no shore power , and no charge when on shore power. However the battaries will stil charge from the Tow vehicule, this saved us since my battaris were so dead the jack would not work.
From my brife attempt to fix it it appeares that the Relay under the sofa is not working and that is the root of our problem. If that is the case I will replace the Relay with a knife switch located in a place that is eaiser to get to. All the store /use switch is makes it convient , since the actual relay is hard to get to.
In our Safari it just had a big rotary switch tucke behing the front sofa, now with the CCD they have gone High Tech.
Also two years ago at Homecomming we met another couple with a CCD , they only had 12v
power when connected to 120vac, they thought that it was normal, since we were at the plant they had Airstream check it , and it was a bad Relay, still under warrenty so replaced for free.
Now it looks like I have the same problem, so these relays may not be very durable, hence the Knife switch replacment if necessary.