Thank all of you for the replies and really, I am surprised. Depending on the converter, I would have thought that 120 volt electricity, through the converter, would provide more power than a stand alone battery. Yes, I know there is a crank handle to move the slide but I really wouldn't want to attempt that task. I really think that is a cheap short cut on Montana's part. I keep the batteries disconnected on my Holiday and keep a conditioner attached to them. My power stays plugged in and ALL 12 volt accessories are operational; including the slide (only one).
What about the insulation? Any comments?