Exactly, I have no idea why
@Sanwizard believes i meant for free. I had this debate with a friend of mine and we were running numbers on how many charging stations could fit on the property of an average Gas station if we looked 15 years into the future and EV's become the dominant vehicles on the road.
Fit is the operative word because you cannot just line people up in tight line and expect the guy in the middle who is getting a 10 Minute charge to have to wait until the guy in front of him and behind him finish getting a 20 minute charge, so cramming in chargers is never going to work. Given the charge time plus the time to wait on a charger to become available you might be stuck for an hour. IMHO Gas stations in general will not be conducive to a conversion to EV charging and will most likely drop in number significantly in the next 20 years.
If you think about it why would anyone want to use a gas station when they can pull into a shopping mall and charge up while they shop for 30 minutes. It's easy enough for the devices to know SOC and calculate how much you will need to pay before the charging even starts. You just push in the plug and swipe your CC and when you get back to your Vehicle has the Kwh of energy you paid for already pushed into your batteries. It's going to be a great time for any business that has parking space, as they can run charge stations and make some extra cash from it while selling their products.