Source: EV Charging Costs Penalize Urban DriversConsumer organization Which? tracks and compares the cost of charging specific EVs using a range of methods: At-home charging costs 28 pence (34 cents) per kWh on average, using a slower AC public charge point costs 35p per kWh, and a rapid DC charge point costs 50p per kWh. This means that recharging a Hyundai Ioniq at home costs 7.3p per mile at current electricity prices, versus 13.1p per mile at the most expensive rapid charging points, a difference of more than £500 ($600) a year if you drive 9,000 miles annually.
That gap widens for more inefficient cars or those that require more power, such as SUVs. The Polestar 2, for example, would cost 13.2p per mile to charge at home versus 23.5p per mile using a rapid charger.
The gap gets even bigger if you compare the cost of charging from wall-mounted smart chargers, which cost around £900 to install, with the cost of a basic cable. Smart chargers let you take advantage of overnight electricity rates, which can drop prices by almost a third.
I had not even considered this. I wasn't aware it would cost more paying at a public charging station vs at home but it makes sense when everything is broken down. You have more control. What is sad is that people who earn less can't afford to pay much but they are stuck doing so which is likely why so many have not made the switch yet in city areas.