I plugged mine in, with gallon jugs of water, the day before leaving to freeze the jugs and have the freezer cold. I was planning on stopping along the way back to SC from MT and plug in at night while I stopped at hotel. I plugged it up once, just to ease my mine, but it wans't needed. I've driven out there again and took a 7cu freezer and a generator. I liked that better as I didn't have to find an outlet or take a 100' extention cord. Check the rules, I had to put the freezer inside my truck while parked on public land due to regulations concerning bears or be fined. I was told that bit of info on here and was confirmed once I started to investigate that "rule".