There are lots of kits out there, but here is my home made version.
In the photos you will see the fan on the frig, it’s simply zip tied to the shelf. It’s easy and non permanent. The wire is seen going to a magnetic switch, so it only runs when the door is closed. I used the same hole used for the drain to get the wire to the outside compartment. In the outside compartment I have a small power distribution board with small fuses, and three switches. One switch turns off the fan, the middle one is for future use and third turns on my LED lights on the awning.
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