What Sunwoda actually claims
The Chinese cell maker, which supplies Geely, Dongfeng and GAC — and which Electrek reported in April 2026 became Tesla's fifth global battery supplier — put four numbers on the table at the Zaozhuang event:
- 10% → 70% SOC in 5 minutes
- 10% → 97% SOC in 9 minutes, at room temperature
- 10% → 97% SOC in 15 minutes at −20 °C, about 700 km of range
- Warranty of 10 years / 300,000 km with no limit on ultrafast sessions
The company also showed an "open ecosystem" combining solar generation, battery energy storage and ultrafast charging — which is the part that matters more than the cell, as I'll get to. Source material: CNEVPost and Sunwoda's own technology page.
Our maths: the average is 5.8C, and 15C can't be an average
A C-rate is simply charge power divided by pack capacity. 1C fills the pack in one hour; 5C in twelve minutes.
Sunwoda moves 87 percentage points of SOC (10→97) in nine minutes, which is 9.67 points per minute, or 580% per hour — an average of 5.8C. A genuine 15C average across that window would move 225% SOC in nine minutes, i.e. more than two full packs of energy. That is physically impossible in a single pack. So 15C is a peak, pulse or cell-level figure, not the rate you will see on a charging-curve chart.
Now the range claim. "100 km every minute" at a realistic 15 kWh/100 km needs 900 kW average. Nine minutes at 900 kW is 135 kWh, which is 87% of a ~155 kWh pack. Run it the other way — the 700 km at −20 °C figure implies about 105 kWh delivered, or 87% of roughly 120 kWh. Both routes land on a pack in the 120–155 kWh class, not the 60–80 kWh LFP packs in today's mainstream cars. In a 70 kWh pack, the same 5.8C average delivers about 45 km per minute, which is fast but not a headline.
The 70–97% window is the genuinely unusual number
Look at the two windows separately. 10→70% in five minutes is 7.2C average. Then 70→97% takes the remaining four minutes — 27 points in four minutes, or 4.05C above 70% SOC.
That second number is the one to watch. Almost every fast-charging protocol in production today tapers hard above 80%, which is why road-trip planners still treat 80% as the ceiling. A car that holds ~4C at 97% SOC would effectively delete the 80% rule. If Sunwoda delivers that on a production cell, it matters more than any peak figure.
BYD got there first, and the numbers look familiar
Sunwoda is not first to this table. BYD's Super e-Platform, launched with the Han L and Tang L, claimed 1 MW charging and 10–70% in five minutes — exactly the same window Sunwoda is now quoting. We covered the same flash-charging pitch when BYD's Denza Z9GT arrived in Thailand at $89,870 with flash charging and a 1,036 km CLTC figure.
The difference in Sunwoda's presentation is the −20 °C result and the unlimited-ultrafast-session warranty. Chinese LFP chemistry has been the weak link in winter fast charging; 10→97% in 15 minutes at −20 °C works out to a 3.5C average on a 120 kWh pack, which is a very different proposition from the cold-weather throttling European drivers know.
The bottleneck is the charger, not the cell
900 kW average and, at a 15C peak on a 155 kWh pack, roughly 2.3 MW. European public DC stalls typically run 150–400 kW. Ionity's current hardware sits at 400 kW; 1 MW-class units are only now arriving. Megawatt Charging System (MCS) standardisation exists, but it is aimed at trucks, not passenger cars.
That is why Sunwoda bundled solar and stationary storage into the announcement. A 900 kW draw is a substation problem, and a buffer battery is the cheapest way around a grid upgrade — the same logic behind Isuzu's 7-minute battery-swap trial for Elf EV trucks in Thailand, which sidesteps fast charging entirely.
For the European picture, our supercharger database of 483 locations is a useful reality check on what hardware is actually deployed here, and you can sort by price on the cheapest-superchargers page.
What should a buyer do with this?
Nothing yet — but keep the cost maths ready. Take a pessimistic public DC price of €0.79/kWh and 18 kWh/100 km: that is €14.22 per 100 km. An 8 l/100 km diesel at €1.75/l is €14.00. Ultra-fast charging is convenience-priced, not cheap-priced, and a nine-minute stop does not change that; it only reduces the time you spend at the expensive stall. Run your own numbers in our charging cost calculator, and use the real-world range calculator rather than a WLTP figure when planning stops.
Meanwhile, the kilometres that actually decide your running cost are the ones charged at home. The contrast with Porsche's production wireless charging at 11 kW and about €83 a year in losses is instructive: 11 kW overnight beats 900 kW for nine minutes on every day except two per year.
What remains open
Sunwoda has not named a production vehicle, a pack size or a launch date. The 9-minute and −20 °C figures come from the company's own testing, not an independent third party. Cell-level results do not automatically survive cell-to-pack integration, cooling design and BMS limits.
The claim worth tracking is the warranty: 10 years or 300,000 km with no cap on ultrafast sessions. If that survives real fleet data, it answers the question every buyer asks before their first road trip — does fast charging kill the battery? Until then, it is a slide, not a spec.
Source: https://electrek.co/2026/09/20/from-10-97-soc-in-9-minutes-sunwoda-joins-the-flash-charging-race/
