I bought the following to be able to plug into an RV 30 amp outlet to charge our X when visiting a friend: RV TT-30 Plug male to EV 14-50 Receptacle female. The first adapter would not work with our X. The company sent us a second one which would also not work. They refunded our money. The company stated that the second adapter was tested on a S before it was sent to us and it worked correctly. I don't know what might be different between an S and our 2017 X but I have these two adapters (which may or may not work) for anyone that wants one. Just pay postage.