The roughly half of Americans who park in their own driveways or garages can plug in their cars when they get home each night and drive to work the next morning on a full charge. The cost is barely noticeable on their utility bill, about equivalent to running a refrigerator overnight.

For the other half of drivers, who don’t have reliable access to off-street parking, it’s more complicated. Some commuters might be able to charge up at work. Maybe your apartment complex or monthly lot has a few spots where you can plug in an EV. God help you if you need curbside charging in a dense city.

“In places like Manhattan, I know what a pain it is to find a parking spot,” Jeremy Michalek, a mechanical engineering professor and co-founder of the Vehicle Electrification Group at Carnegie Mellon University, told The Daily Beast. “If you add the constraint that some of those spots have chargers and some of them don’t, it just makes it even more of a nightmare.”