At an AC charging station, AC power in the grid is supplied to this onboard charger, which converts it into DC power to recharge the battery. DC chargers provide higher power charging (which requires much bigger AC-to-DC converters) by building the converter into your charging station instead of the vehicle https://canine-canoe15611.mdkblog.com/38706969/a-simple-key-for-apple-car-charger-usb-c-unveiled