I use the Powerwerx Panelpole outlets inside my van, but on the outside the "weather tight cover" failed to stay closed and would frequently pop open, exposing the port to weather.
I put it under a secondary cover and used it for my outside DC outlet, and replaced my external solar panel outlet with a CNLINKO LP-28 2-Pin IP67 Waterproof Connector rated up to 50A.
I did that so if I leave my external panels outside overnight, I didn't have to worry if an unexpected rain storm gets the outlet wet.
We have very little open room in our van, so I spent stupid money on a compact 400W folding solar panel for "van roof in shade" and "need extra power" days.