Inspired by this post and aware that not all sites on our forthcoming trip to Italy are generous with the Amps, I've also made a version of this. This is to go inside an awning for a folding camper, but I've none-the-less made it waterproof. It's also massively over-engineered due to my DIY incompetance.
Working unit first of all:
And now the internal wiring before it all got sealed up. First time I've done something like this so appreciate any qualified electricians on the site telling me whether I'm likely to blow myself up.
Coincidentally when we had our beloved Cabanon Andorra, I also built a sink. There must be something in the genes of us campers that makes us want to add gadgets.