[Kidkraz]

You can run the fridge off of the battery, but I doubt it will run very long and you’ll drain the battery pretty quickly.
Before I had a 30 amp outlet added to the side of my garage for the trailer, I would open the camper and if I wanted to run the fridge, I figured out that I could plug the fridge directly with an extension cord to an outlet in my garage. If you remove the lower access panel for the fridge, you should find a 110 outlet the fridge is plugged into. I ran a short extension cord about 6-10” long and in the picture you’ll see orange short cord. I plug the garage extension into that and the fridge to the short cord. It works, I don’t use it at the camp ground. Now that I have a 30 amp plug, I no longer need the short extension, but I’ll have it as a backup.