To fill a car with gas, you generally just need a credit card or cash. To charge an EV at a DC fast charging station, you need any number of things to work—a credit card reader, an app for that charger's network, a touchscreen that's working—and they're all a little different. That situation could change next year if a new "universal Plug and Charge" initiative from SAE International, a group of EV carmakers and chargers, moves ahead and gains ground.