That depends upon a lot of factors: the car, the State-of-Charge (SOC) of the car, and the charge station. However, we can make some simple assumptions for typical non-Tesla cars today at typical stations. Most stations limit you to 30 minutes for one session. That’s one-half hour. The cars store kilowatt-“hours” in the traction battery. The stations are rated in “kilowatts” (kW). Today’s “typical” station is 50 kW. Thus, if you charge at a 50 kW station for 1/2 hour, you can expect about 25 kWh.
That’s just a ball park number. I use it, but it won’t tell you exactly how much to expect. For example, many “50 kW” stations are not 50 kW but only 40 kW. (No. I am not going to explain why that is.) Further, a true 50 kW station doesn’t dispense 50 kW to your battery because of inefficiencies. You’re more likely to get something like 44 kW. So, for a 30-minute charge you will get 22 kWh.
Sort of. How much you actually get from a dispenser depends upon your car and when in the charge-discharge cycle you arrive at the dispenser. If you arrive at a charge station to “top up” a battery that’s already largely filled, the car will ask the charge station for a limited amount to protect the battery. The car may ask for less than 10 kW from the charging kiosk if your battery is nearly full.
