P3 Charging Index for electric cars: Kia EV6 wins

P3 Charging Index – Charging speed e-cars
Go then! 309 kilometers in 20 minutes charging time

With its Charging Index, the P3 Group determines the true charging speeds of electric cars. For the first time, the charging champion comes from Korea. Last year’s winner falls back to second place.

Kia beats Mercedes: The Charging Index of the P3 Group (P3CI) makes possible what is rarely the case in car comparison tests. The consulting company from Stuttgart has compared the true charging speed of electric cars for the third year in a row. In the current ranking, she sees the Kia EV6 with a 77.4-kilowatt-hour battery and rear-wheel drive at the top. And that’s pretty clear: With a value of 1.03, the Korean can not only beat the concentrated German electric upper class, but also its platform brother Hyundai Ioniq 5.


The P3 Group collects the index so that buyers do not have to be dazzled by the maximum charging capacity of an e-car. It may be that a Porsche Taycan can charge with almost 300 kW under ideal conditions and with a preconditioned battery. But if he quickly regulates this power back down again, you may not be able to continue the journey faster than in a competing product. Therefore, P3 only considers the charging window between ten and 80 percent State of Charge (SoC). For better comparability, all competitors were measured on fast charging stations from the same manufacturer. The exception is Tesla models, which only reach their optimal charging capacity on the company’s own superchargers.


How many extra kilometers in 20 minutes?

The index is calculated by P3 determining the quotient of the real range recharged in a period of 20 minutes to a target value of 300 kilometers. Anyone who fulfills exactly this condition achieves a P3CI of 1.0. Since the Kia even ends up at 1.03, it can even recharge a range of more than 300 kilometers in 20 minutes; it’s 309 kilometers to be precise. This makes the EV6 the first car ever in the history of the P3 Charging Index to break the 1.0 mark.



In last year’s edition of the P3CI, the Mercedes EQS 580 was still ahead. In 2022, the Swabian falls back to second place, but this is not because the 450+ model version was rated this time. This even achieves a better value: in 2021, a P3CI of 0.88 or 266 kilometers was still enough for the electrician with the star to win. This time, the EQS 450+ even managed a charging index of 0.92 or 275 kilometers – and still only came in second.


Close race on the other places

A look at the further ranking shows that there are now some very fast charging electric cars. The BMW iX xDrive 50 (P3CI of 0.91 and 273 kilometers respectively), the Hyundai Ioniq 5 2WD (0.91 and 272 km respectively) and the Porsche Taycan GTS Sport Turismo (0.90 and 271 km respectively) all follow closely behind Mercedes and achieve values ​​that would have been enough to win last year.

P3 Group Ltd

It is not surprising that the two Korean electric cars perform so well: Like the Taycan, they use an 800-volt electrical system architecture. As the charging curve shows, they are able to maintain their initial Mega Energy Boost when refueling until the battery has reached a good 50 percent of its capacity again. Advantage of the Kia over the Hyundai: In terms of charging capacity, it starts a little higher (about 235 kilowatts) and thus gains a lead that none of the competitors can catch up with.


Paradox Porsche Taycan

The Taycan and the largely identical Audi E-Tron GT Quattro, which are also blessed with an 800-volt architecture, are significantly higher, each with over 250 kW. At 276 kW, the Taycan even achieves the highest maximum charging power of all electric cars tested. But both models break down at 45 percent capacity – and that too much more than the competition. In this way, the Taycan manages the “trick” of offering the highest average charging power at 227 kW, but still recharging 300 kilometers more slowly in the SoC range between 10 and 80 percent than four other electric cars.



The EQS, on the other hand, masters the art of keeping up with just 400 volts. Initially, it only charges with around 210 kW and only maintains this level until the battery is not even 30 percent full. But its curve then drops much flatter than that of the southern German 800-volt competition, which is why it finally gets a slightly higher P3CI with staying power. Incidentally, the charging curve of the BMW iX, which also relies on a 400-volt battery, is very similar.


VW ID.3 charges significantly slower than 2021

For the first time, the P3 Group determined the P3CI in three different classes: compact (BAFA net list price up to 35,000 euros), medium (35,000 to 65,000 euros) and upper class (from 65,000 euros). The fact that more expensive electric cars apparently have better charging technology is shown by the rather meager performance of the compact class vehicles in comparison. The best e-car for less than 35,000 euros, the VW ID.3 with a 58-kilowatt-hour battery, only manages a P3CI of 0.51 and recharges 153 kilometers in 20 minutes. Last year’s performance of the model version ID.3 Pro S with 0.73 or 220 kilometers shows that the model can do it better. That was enough for third place overall in 2021.


In its evaluation, the P3 Group also considers a phenomenon that has already proven to be a constant annoyance in combustion vehicles: the discrepancy between the standard consumption value and the actual energy consumption. For this evaluation, the consulting company uses the WLTP value on the one hand and the actual power consumption according to the ADAC Ecotest on the other. By exceeding its standard consumption of 20.0 kilowatt hours per 100 kilometers by just two percent in reality, the BMW iX xDrive50 clearly wins this category. The Polestar 2 LR Single Motor (plus eight percent) and the Kia EV6 (plus eleven percent) follow on the other podium places.


Two Audis with the highest power consumption

As far as energy consumption is concerned, there are two Audis at the end of the field. The worst performer is the Audi E-Tron GT Quattro: In the ADAC Ecotest, it consumes 26.3 kilowatt hours per 100 kilometers and exceeds its WLTP standard by 22 percent. The brand colleague E-Tron 55 Quattro is hardly better with 25.8 kWh/100 km or 13 percent. The biggest discrepancy between the factory specification and real consumption can be seen in the VW ID.4 with a 77-kilowatt hour battery: According to the ADAC, it consumes 22.8 instead of 16.4 kWh/100 km – a discrepancy of a whopping 28 percent.


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Conclusion

The P3 Charging Index provides interesting insights into the actual charging speed of electric cars. Because it shows: Maximum peak performance does not have to mean that this car is actually the fastest to refuel. In general, it can be seen that the vehicles with 800-volt architecture can also use their theoretical advantage in practice. However, 400-volt cars can also keep up if they are implanted with an intelligent charging strategy – see Mercedes EQS and BMW iX.

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