800-volt EV charging is the reason the quickest electric cars on sale in the US can go from 10 to 80% in 20 minutes or less, and BYD now sells two cars in China that make even that look slow. Both can add most of a charge in about the time it takes to buy a coffee. The second-generation Seagull, which went on sale on Oct 20, charges from 10 to 70% in 5 minutes on its three bigger-battery trims, according to BYD’s Seagull page. The Da Han flagship sedan, launched a week earlier on Oct 13, does 10 to 70% in 5 minutes and 10 to 97% in 9 minutes, and BYD says a charge at minus 30°C takes only about 3 minutes longer, per BYD’s launch release.
Among the US models below, the quickest official 10 to 80% times are about 18 to 21 minutes. The gap comes down to three things: the car’s voltage, the battery’s ability to take a charge, and the station on the other end of the cable.
Why higher voltage means faster charging
Charging power is voltage multiplied by current. To push 350 kW into a car, a charger has to send about 875 amps at 400 volts. At 800 volts, the same 350 kW needs only about 440 amps.
Current is what makes heat. Heat in a cable or connection rises with the square of the current, so halving the current cuts that heat to about a quarter. An 800-volt car can take the same power through thinner, lighter parts, or much more power through the same parts before anything runs too hot.
Tesla’s numbers show the effect. Its V4 Supercharger post is rated for 615 amps of continuous current, according to Tesla’s Supercharger for Business page. By our math, 615 amps at about 400 volts works out to roughly 250 kW, which is the 250 kW peak Tesla lists for the Model 3 and Model Y. The same current at 800 volts is close to 500 kW, which matches the 500 kW per post Tesla rates the V4 hardware at for passenger cars.
BYD goes further still. Its 2025 Super e-Platform release describes a 1,000-volt system charging at 1,000 amps, or 1 megawatt. The Da Han is a 1,000-volt car, Latest EV News reports, with a 102.3 kWh second-generation Blade Battery, according to CnEVPost. The “570 kW” figure in some Da Han reports is the all-wheel-drive car’s combined motor output, not its charging power. BYD hasn’t given a peak charging figure for the car. By our math, treating 102.3 kWh as usable, 10 to 97% in 9 minutes averages roughly 600 kW for the whole stop, and 10 to 70% in 5 minutes averages more than 700 kW.
“800-volt” is a class name rather than an exact number. Pack voltage changes with the state of charge and the size of the battery. Hyundai lists the 84 kWh IONIQ 5 pack at 697 volts and the smaller 63 kWh pack at 523 volts, while Kia lists the 99.8 kWh EV9 at 552 volts. All three ride on the same family of high-voltage hardware.
The station matters as much as the car
An 800-volt car only charges at full speed on a station that can supply 800 volts and enough power. Plug into an older 400-volt charger and the car has to step the voltage up with an onboard converter, or switch its battery into two halves, and charging slows down.
Porsche spells this out on its support site. A current Taycan charges from 10 to 80% in 18 minutes at up to 320 kW on an 800-volt station. On a 400-volt station it tops out at 150 kW and takes 33 minutes. Taycans from 2020 to 2024 without the optional 150 kW onboard DC charger are held to 50 kW on 400-volt stations.
Hyundai’s numbers tell the same story with Tesla’s network. The 2027 IONIQ 5 charges from 10 to 80% in about 20 minutes on a 350 kW, 800-volt charger, and in about 30 minutes at a V3 or V4 Supercharger, Hyundai says. The Mercedes-Benz CLA shows how wide the gap can be. It is rated at up to 320 kW on 800-volt chargers, but Mercedes-Benz USA says it tops out at 100 kW on 400-volt DC chargers.
Tesla built the Cybertruck around 800 volts. Its Q3 2023 update letter said that for very heavy vehicles a high-voltage powertrain “brings notable cost savings.” Tesla rates the truck at up to 325 kW at Superchargers.
Peak kW vs the charging curve
The peak kW on a spec sheet is the fastest a car charges for a short stretch, usually when the battery is low and warm. As the battery fills, the car asks for less power to protect the cells. How long a car holds a high rate matters more than how high it starts.
GM’s own figures show why. The 2026 Silverado EV WT with the Max Range battery runs at 800 volts and charges at up to 350 kW, yet GM lists 46 minutes from low to 80%. Its battery is very large, so even a high rate takes a while. The 124 miles it adds in 10 minutes is the more useful road-trip number.
Battery size also explains the Seagull. Its Flash Charging trims use a 39.2 kWh pack, per BYD’s parameter sheet. By our math, 10 to 70% in 5 minutes averages under 300 kW, a level some US chargers already reach. For comparison, the IONIQ 5’s 84 kWh pack going from 10 to 80% in 20 minutes averages about 175 kW. The Da Han is the more striking car because it holds that kind of pace with a battery more than twice the Seagull’s size.
Temperature matters too. Cold batteries charge slowly, which is why Tesla, Lucid, Porsche and others warm the pack on the way to a fast charger when you navigate to one. Lucid also notes that heavy DC fast charging can lead the car to lower its own charging rate to protect long-term battery health, according to its charging guide.
Where US-market EVs sit
The figures below come from each maker’s own pages. Makers quote charging in different ways, some as 10 to 80% times and some as miles added in a set number of minutes, so the table keeps each in the form the maker uses. For range and efficiency on thousands more models, see the Electron Motion EV Database. Tesla doesn’t list pack voltage for the Model 3 or Model Y, so those rows use the common industry label.
| Model | System voltage | Peak DC power | Maker’s fast-charge figure |
|---|---|---|---|
| Tesla Model 3 (RWD) | 400-volt class | 225 kW | Up to 170 miles in 15 min |
| Tesla Model 3 Premium | 400-volt class | 250 kW | Up to 195 miles in 15 min (RWD) |
| Tesla Model Y (RWD) | 400-volt class | 225 kW | Up to 160 miles in 15 min |
| Tesla Model Y Premium | 400-volt class | 250 kW | Up to 182 miles in 15 min (RWD) |
| Tesla Cybertruck Premium AWD | 800 volts | 325 kW | Up to 137 miles in 15 min |
| Hyundai IONIQ 5 (2027, 84 kWh) | 697 volts | Not listed | 10 to 80% in about 20 min (350 kW, 800-volt charger); about 30 min at a V3/V4 Supercharger |
| Kia EV9 (2026, 99.8 kWh) | 552 volts | 210 kW | About 24 min on a 350 kW charger |
| Lucid Air Grand Touring | 900V+ | Not listed | Up to 200 miles in about 12 min |
| Lucid Air Pure | 900V+ | Not listed | Up to 200 miles in about 16 min |
| Lucid Gravity Grand Touring | Over 900V | 400 kW | Up to 200 miles in about 11 min |
| Porsche Taycan (2025 on) | 800 volts | 320 kW (Performance Battery Plus) | 10 to 80% in 18 min; 33 min at a 400-volt station (150 kW) |
| Porsche Macan Electric | 800 volts | 270 kW | 10 to 80% in 21 min; 33 min at a 400-volt station (135 kW) |
| Mercedes-Benz CLA 250+ | 800 volts | 320 kW | Up to 201 miles in 10 min (WLTP basis, 800-volt charger) |
| Chevrolet Silverado EV WT Max Range | 800 volts | 350 kW | Low to 80% in 46 min; 124 miles in 10 min |
| Chevrolet Silverado EV WT Extended Range | 670 volts | 300 kW | Low to 80% in 42 min; 111 miles in 10 min |
| Rivian R2 | Not listed | Not listed | 10 to 80% in under 30 min; 150 miles in 15 min |
Tesla’s 400-volt Model 3 and Model Y hold their own because they are light and efficient, so each minute at a Supercharger adds a lot of miles. Up to 195 miles in 15 minutes for the rear-drive Model 3 Premium beats the 178 miles Hyundai quotes for the 800-volt IONIQ 5 in the same time.
What a US driver can get today
Among the models above, the best case is roughly 18 to 21 minutes for 10 to 80% in a Taycan, an IONIQ 5 or a Macan Electric on the right charger, or about 200 miles in 11 to 12 minutes in a Lucid Gravity or Air Grand Touring. Lucid’s times assume a DC charger that can supply enough power, and the Gravity Grand Touring can take up to 400 kW, according to Lucid’s 2025 annual report. Those times depend on finding a station that can actually deliver 800 volts and 300 kW or more, arriving with a low and warm battery, and not sharing power with the car in the next stall. The practical moves are simple: navigate to the charger so the car warms the battery, arrive low, leave around 80%, and check the station’s voltage if you drive an 800-volt car.
Faster cars are on the way, but mostly abroad first. The Mercedes-AMG GT SUV, rated at up to 710 kW, has no US timing yet.
What would need to change for BYD-style minutes here
The stations are closer than the cars. Tesla’s V4 hardware already supports 400- to 1,000-volt cars and up to 500 kW per post, and Tesla already runs megawatt charging for the Semi, as we covered with its Georgia Megacharger site. The fastest-charging car in the table, the Lucid Gravity Grand Touring, tops out at 400 kW.
Three things would have to come together. Cars would need batteries built to accept very high current across most of the charge, the way BYD describes its Blade 2.0 cells. Stations would need well over 500 kW per stall; BYD’s own Flash Charger is rated at 1,500 kW from a single connector and is paired with on-site battery storage so it doesn’t overload the local grid, BYD says. And those stations would need to exist in numbers. BYD had 12,165 Flash Charging stations running in China at the Seagull launch, according to Kuai Technology, with a goal of 20,000 by the end of 2026 on BYD’s Da Han page.
BYD doesn’t sell passenger cars in the US, so the Seagull and Da Han won’t be the ones to bring 5-minute charging here. What they show is that the technology works at scale, and US drivers will feel it once a maker here pairs a battery like that with a station network built to feed it.