This extension cord works great and I need the Tesla style so it will back up my house if I lose power, which as already come in handy when a tree took out my power, it popped right over to my truck! The point is I didn't want to be dragging the NACS coupler on the driveway, so used this boat...
I needed an extension for my power cord, but was concerned about the coupler. I found this cover for outboard boat cables that is working well.
https://www.amazon.com/gp/product/B0CCJ2MQHD/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
maybe someone else has found something better??