Which raises a question I always have about these types of locations.
If I wanted to go to town for the day (post lockdown lunch, film, stroll) would it be acceptable for me to plug our car in, get on the bus, and leave it there hogging the charger for maybe 5 or more hours.
Given the limited number of chargers currently available at locations we use (supermarkets currently) my wife and I make it a policy to return and remove the ZS after an hour to allow others a fair chance (this does not necessarily seem to be reciprocal though) although it would sometimes be easier just to leave it.
My wife always gets concerned if she sees someone waiting when she returns and ends up apologising for using the charger