WattsUp's suggestion about trying to figure out a way to cooperate is a good one. The more complicated and the more management has to get involved, the higher the probability the perk will be taken away.
There are some fantastic lessons in WattsUp's first post. Read that over carefully - there's no reason why every company can't do exactly what they've done, on different scales of course. Well valet parking is something - oh honestly - I've never ever heard of at a workplace. He must work at a really special cool place.
Not a story about charging, but a story about how something really good can get taken away because of perception (sorry I have no charging information about work, I've been retired for two years - nobody ever even thought about car charging where I worked, and I'm sure they still haven't - company in the Chicago suburbs).
We used to have "take home" - researchers would have to order a pallet load of product from the plants - that was the smallest size they could get. When they only needed some of the pallet, they would put the product out at the employee exit for people to "take home". It worked great for a long time. Somebody that worked on our floor was a really nice guy - like super nice guy - but creepy. He seemed to always know when "take home" was happening. He took a cart down and would load up the cart. People saw that and accused him of taking all that product home and selling it. In fact, what he was doing was bringing it all up to our floor and distributing it to everybody. Super nice thing to do, just looked wrong to everybody.
A lot of people whined. Management got tired of the whining and decided, instead of rules, all the product would be donated. Turned out only product that was properly labeled and within code could be donated. That ended up being about 5% of what was "take home". So now all that product went to the trash, it had to be disposed of.
And then management got the bright idea of "product of the month." That was an even worse nightmare - now they had to count up the number of people in your department and people had to come down, check off that they took only the number from their department, and then go back and distribute the product. Can you see the waste in human resources for this crazy program? Time wasted was monumental.
Eventually the program was done away with. The rules and problems were too many, management couldn't come up with a good way to work out the program.
Don't let electricity at your work become "take home." It could if it becomes too complicated and time consuming.