LrnnandCarol did a great job answering your question. I will add that when we purchased out TT I was hoping to find a three way frig. I ended up with a AC/gas unit. I do not miss the DC option. I operate on gas when traveling and it switches to AC when on shore power. The gas cunsumsion seems small to me. There are some that are not comfortable using gas when traveling but I feel they are the minority. There probably is less of a potential for something to go wring traveling with DC. Your call.