Similar but different issue:
Our local utility offers Level 2 chargers at several locations, free for the first two hours and then a dollar an hour, up to a max of eight dollars.
At one of these charging stations at the shopping mall, there is a white Model 3 that uses it everyday, all-day. So basically, this person has a personal charger that no one else gets to use.
What do you do in this situation?
Personally, if it affected
my charging opportunities on a
regular basis, in other words, I also work at the mall but need to charge my car for several hours, I would talk to whoever makes the rules for the stations and ask that the "idle" fee be increased to something like $1/min after a four hour time limit. That should be plenty enough incentive to move. Keep the same "first two hours free", then $1/hr. There would also need to be a way of monitoring any gaming of the system, like unplugging and re-plugging in order to reset the 4 hour timer. Since it's a paid system, maybe lock out the same credit card / charging account from being used twice in a row on the same station?
A change like this should incentivize a long-term parker into moving their car at least once a day. Their overall cost for parking will actually go
down (they'll get four free hours, instead of two) and making them move will open up a space that normally would be taken all day. For shoppers, it shouldn't be a problem as I would think that hardly anyone would spend more than 4 hours at the mall. Even if they are at a 2 1/2 hour movie, that still gives them 90 minutes for lunch/dinner.
edit: Thinking about this for a few minutes I realized that it might be possible for
two people to conspire to get around the "move your car after the 4hr limit". It would take some time coordination to pull off and also long enough charging cables but it could be done, I can think of no way to prevent this scenario other than the hope that eventually one of the participants fails to get back to their car in time and racks up a large enough idle fee that convinces them to abandon the idea.