Yahoo Autos How fast do electric cars really charge?
With the adoption of electric cars only accelerating as manufacturers put more and more money behind them, as ZEV mandate legislation pushes their adoption ever harder, and as customers move in greater and greater numbers to trade in their combustion-engined cars in favour of them, one main barrier to ownership looms in the minds of those unsure whether an EV will meet their needs: the charging question.
How and where will I charge? How long will it take? And is the infrastructure in place?
For most owners who’ve already adopted, and many of those still to, home charging is and will remain key to making an EV practical. But for plenty of others, home charging will never be possible, and urban charging infrastructure on residential streets is proving slow to appear.
Public DC rapid charging, then, will remain critically important for a great many, and for a considerable time to come. But even now, there are big differences in the rate at which one electric car may be capable of charging, out in the real world and away from the spec sheet, compared with another. So how fast can new EVs charge right now, assuming you find the right charger? And which are the quickest?
Since the autumn of 2022, Autocar has been benchmark testing the rapid-charge performance of all electric cars that undergo our full road test, and below you can see the results. They reveal several important facts: that true charging speed can be a far cry from any car’s claimed peak rate, when you calculate an average across the full breadth of available battery capacity. Also, that the rate of rapid charge of all EVs should be expected to slow down considerably as their batteries fill up. Some cars, however, slow considerably more than others.
How we test electric car charging speeds
Our approach to our rapid charge test is simply to use a rapid charger of sufficient capacity to meet the test car’s peak charging rate; and to observe and record how much power is actually drawn by the car as it passes a 10%, 30%, 50%, 70% and 90% state of charge (SOC).
Practicability dictates that we cannot use the same DC charger for every test and, while we pre-condition the car’s battery before charging where possible, many EVs don’t allow this once battery condition has dropped below 10%.
We then average our test results with a weighting that reflects the need that rapid charging typically meets for EV drivers. Public rapid charging is relatively expensive compared with home charging. Most use it to extend the range of their cars for a particular journey, rather than as a regular habit, and as a result few rapid charge from less than 20% charge, or to beyond 80% (because doing that isn’t time-efficient or beneficial to battery longevity).
For that reason, the rapid charge rate demonstrated by a new car as it passes 50% SOC contributes three times as much towards our aggregated charge rate result as the equivalent rate indicated at either 10% or 90%; and likewise, the rates recorded at 70% and 30% are doubly important as those at the extremes of the battery condition spectrum.
So, would you expect one of the best-value electric cars in Britain to appear within the top half of this list? Would you expect to see a top three without a Tesla in it? Here are the quickest- and slowest-charging electric cars that Autocar has yet road tested.
1. Porsche Taycan GTS Sport Turismo (2023)
Claimed peak rate: 270kW
Peak rate on test: 263kW
Average test charge rate: 198kW
Usable battery capacity: 83.7kWh
Test charger: Ads-tec/Porsche Engineering HBD 1120, operated by Porsche
Test charge conditions: dry, 22deg C
Porsche Taycan GTS Sport Turismo review
2. Audi E-tron GT Vorsprung (2023)
Claimed peak rate: 270kW
Peak rate on test: 248kW
Average test charge rate: 189kW
Usable battery capacity: 83.7kWh
Test charger: Tritium TRI 121-350, operated by Gridserve
Test charge conditions: dry, 7deg C
3. Hyundai Ioniq 6 RWD Ultimate (2023)
Claimed peak rate: 233kW
Peak rate on test: 229kW
Average test charge rate: 180kW
Usable battery capacity: 77.4kWh
Test charger: Tritium TRI 121-350, operated by Gridserve
Test charge conditions: dry, 13deg C
4. Kia EV9 GT-Line S
Claimed peak rate: 210kW
Peak rate on test: 210kW
Average test charge rate: 170kW
Usable battery capacity: 99.8kWh
Test charger: Kempower Satellite Charger, 400kW
Test charge conditions: dry, 12deg C
5. Kia EV6 GT
Claimed peak rate: 350kW
Peak rate on test: 224kW
Average test charge rate: 169kW
Usable battery capacity: 77.4kWh
Test charger: Tritium TRI121-350, operated by Gridserve
Test charge conditions: dry, 30deg C
6. Tesla Model S Plaid
Claimed peak rate: 250kW
Peak rate on test: 254kW
Average test charge rate: 151kW
Usable battery capacity: 97kWh (est)
Test charger: Tesla Supercharger V3
Test charge conditions: dry, 18deg C
7. BMW i7 xDrive60 M Sport (2023)
Claimed peak rate: 195kW
Peak rate on test: 196kW
Average test charge rate: 148kW
Usable battery capacity: 101.7kWh
Test charger: Tritium TRI 121-350, operated by Gridserve
Test charge conditions: dry, 8deg C
8. Rolls-Royce Spectre (2023)
Claimed peak rate: 195kW
Peak rate on test: 194kW
Average test charge rate: 135kW
Usable battery capacity: 102kWh
Test charger: Kempower Satellite Charger, 400kW
Test charge conditions: dry, 11deg C
9. Mercedes EQE 350+ AMG Line Premium (2022)
Claimed peak rate: 170kW
Peak rate on test: 165kW
Average test charge rate: 131kW
Usable battery capacity: 90.6kWh
Test charger: Tritium TRI 121-350, operated by Gridserve
Test charge conditions: dry, 13deg C
10. Polestar 2 Long Range Single Motor (2023)
Claimed peak rate: 205kW
Peak rate on test: 192kW
Average test charge rate: 124kW
Usable battery capacity: 79kWh
Test charger: Tritium TRI 121-350, operated by Gridserve
Test charge conditions: dry, 29deg C
11. BMW i5 eDrive40 M Sport
Claimed peak rate: 205kW
Peak rate on test: 198kW
Average test charge rate: 122kW
Usable battery capacity: 81.2kWh
Test charger: Tritium TRI 121-350, operated by Gridserve
Test charge conditions: dry, 12deg C
12. Hyundai Ioniq 5 77kWh RWD Ultimate
Claimed peak rate: 225kW
Peak rate on test: 152kW
Average test charge rate: 121kW
Usable battery capacity: 77.4kWh
Test charger: Tritium TRI 121-350, operated by Gridserve
Test charge conditions: dry, 1 deg C
13. Tesla Model 3 Long Range (2024)
Claimed peak rate: 250kW
Peak rate on test: 219kW
Average test charge rate: 117kW
Usable battery capacity: 75.0kWh (est)
Test charger: Tesla V3 Supercharger
Test charge conditions: dry, 14 deg C
14. Volkswagen ID Buzz SWB Style Pro (2023)
Claimed peak rate: 170kW
Peak rate on test: 185kW
Average test charge rate: 114kW
Usable battery capacity: 77.0kWh
Test charger: Tritium TRI 121-350, operated by Gridserve
Test charge conditions: dry, 9deg C
15. Audi Q8 E-tron 55 Quattro Vorsprung (2024)
Claimed peak rate: 170kW
Peak rate on test: 136kW
Average test charge rate: 110kW
Usable battery capacity: 106kWh
Test charger: Tritium TRI 121-350, operated by Gridserve
Test charge conditions: dry, 4 deg C
16. MG Motor MG 4 Long Range SE
Claimed peak rate: 135kW
Peak rate on test: 139kW
Average test charge rate: 109kW
Usable battery capacity: 61.7kWh
Test charger: ABB HP CP500 CJ, operated by Gridserve
