First: There is a recall on Norcold absorption cooling units, Same as on Dometic, Check the norcold web site for more informaiton on it (I have a dometic so I'm not 100% up on the Norcold) Page 2:
Another thing that is common to both Norcold and Dometic (Right down to the price, they are expensive, but.. All factors concerend, I'm not sure how much)
They have a couple of dual power (AC/DC) units, no propane at all, these are compressor units, I have linkes to the dometic products and will provide one so you know what i"m typing about
Click Here These units draw less than fifty watts
In fact they usually draw less than 40 watts
They are compressor units, Just like your home fridge, but they are new tech. I have a chest freezer in my rig (just carried it out of the house) that is 1: Small (about 1.5 cubic feet) and 2: draws 36 watts running and 3: is 4 years old and going strong
Very impressive box when you look at how much it sucks from the batteries. Did i say Sucks, sips is more accurate