My fridge is the Dometic CFX75. It was empty at the time though I wouldn't think it would cycle enough to kill the battery in a single night. I'm charging up the Flexopower now and I'll give it another test.Which fridge do you have Stickel? I think you should easily get a full night on a 400W battery. My ARB ends up at about between 80 - 120Wh overnight with the fridge empty if I can believe battery % on the goal zero read out. BTW - An empty fridge does cycle on more.