I was walking in my neighborhood (Noe Valley, San Francisco) this morning and came across this plug coming out of the sidewalk. The plus was charging a Mercedes. I guess the owner used the underground pipe to connect the plug to his house. It's a pretty discret solution that doesn't leave a cable on the sidewalk as I have already seen many times.
And the best news of all: I have also a similar plate in front of my house
And the best news of all: I have also a similar plate in front of my house