I noticed many manufactures using Samsung double door models last weekend. I have read some articles about many of these refrigerators, tending to run all the time. I know both our side by sides at home run hot. Again I think venting that heat might be an issue. Also I have used this website below for calculating usage with my generator. It's been fairly accurate. I have an amp meter you can plug into each appliance, to see its real time useage! It's just common sense that these fridges are big energy vampires. Most diesel pushers run air ext on their generators, while going down the road. I guess you could run one in the fifthwheel?
http://www.donrowe.com/usage-chart-a/259.htm