What Is Ultra-Fast 350 kW EV Charging?
Imagine adding hundreds of miles of driving range while taking a short coffee break. Ultra-fast 350 kW charging is transforming long-distance EV travel by delivering faster-than-ever charging for compatible electric vehicles.
Ultra-fast 350 kW charging adds about 250 miles of range in only 20 minutes for compatible 800V electric vehicles. This speed is the fastest currently available for public use in the U.S. You can find these at Electrify America High Power Charging (HPC) stations, select IONNA locations, and a few other premium sites.
Not every electric vehicle can reach 350 kW. Only cars with 800V architecture—such as the Hyundai Ioniq 5/6, Kia EV6/EV9, and Porsche Taycan—can fully use this speed.
Not sure what your specific EV’s ceiling actually is? See our guide on what the maximum charging speed of your EV is.
What Is 350 kW Charging?
A 350 kW charger delivers 350 kilowatts of DC power directly to your vehicle’s battery. If a car maintains this top speed, it gains about 1 kWh of energy every 10.3 seconds. For a 75 kWh battery, charging from 10% to 80% takes about 9 minutes.
In real-world use, these sessions take 13 to 18 minutes. Charging speeds slow down due to the charging curve’s taper, the need for battery temperature management, and a drop in power as SoC (State of Charge) nears 80%.
Which EVs Can Use 350 kW Charging?
| EV | Max DC Rate | Architecture | 10–80% at 350 kW Station |
|---|---|---|---|
| Hyundai Ioniq 5 LR AWD | 350 kW | 800V | ~18 min |
| Kia EV6 / EV9 | 350 kW / 239 kW | 800V | ~18 min / ~24 min |
| Porsche Taycan | 320 kW | 800V | ~22 min |
| Genesis GV60 / GV70 E | 350 kW | 800V | ~18 min |
| Lucid Air | 300 kW | 900V | ~22 min |
| Tesla Model Y (400V) | 250 kW max | 400V | ~27 min (cannot use full 350 kW) |
| VW ID.4 (400V) | 135–175 kW max | 400V | ~28 min (cannot use full 350 kW) |
Why 400V EVs Cannot Reach 350 kW Charging Speeds
The physics of high-power DC charging requires both high voltage and high current. A higher current creates more heat.
At 350 kW:
- If the battery voltage is 400V, the charging system needs about 875 amps. This produces excessive heat, making it difficult to manage safely.
- If the battery voltage is 800V, the required current drops to about 437.5 amps. Modern charging cables and battery systems can safely handle this level.
That is why only 800V architecture vehicles can safely accept charging speeds close to 350 kW.
A 400V EV connected to a 350 kW charger will only draw the maximum charging power its battery supports. The charger does not force 350 kW into the vehicle. Instead, it supplies only the power requested by the EV.
Where Can You Find 350 kW EV Chargers?
Electrify America operates the largest network of 350 kW chargers in the United States. These stations are commonly located at Walmart stores, major highway corridors, and urban commercial areas.
Check the Electrify America app before your trip because not every charging stall at a station supports 350 kW charging.
IONNA Charging Network
IONNA is a new automaker-backed charging network that is expanding rapidly across the United States. Many of its stations support charging speeds between 150 and 400 kW, making them some of the fastest public chargers available in 2026.
Shell Recharge
Some Shell Recharge locations include 350-kW high-power charging stations. Availability varies by location, so it is best to confirm through the charging app before arriving.
Tesla Supercharger V4
Tesla Supercharger V4 stations provide charging speeds up to 250 kW. While they do not offer 350 kW charging, they still deliver excellent charging performance for Tesla vehicles and other compatible NACS-equipped EVs
Curious how semi-trucks push power even further? See our guide on what megawatt charging is for electric semi trucks.
Conclusion
Ultra-fast 350 kW charging has made long-distance EV travel much more convenient. Compatible 800V electric vehicles can charge from 10 to 80% in about 18 minutes, making charging stops much shorter during road trips.
The technology is now widely available through Electrify America High Power Charging stations, expanding IONNA locations, and selected premium charging networks. However, drivers of 400V EVs should remember that using a 350 kW charger will not increase charging speed beyond the vehicle’s own maximum charging capability.
Curious how this compares to filling up with gas? See our guide on whether EVs will ever charge as fast as filling up with gas.
Frequently Asked Questions
Can every electric vehicle use a 350 kW charger?
Yes. Most modern EVs can plug into a compatible 350 kW DC fast charger, but the vehicle will only charge at its own maximum supported speed.
Is a 350 kW charger faster than a 150 kW charger?
For 800V EVs that support very high charging speeds, a 350 kW charger can significantly reduce charging time. For most 400V EVs, charging speed will remain limited by the vehicle.
How long does it take to charge an EV with a 350 kW charger?
Charging time depends on the vehicle, battery size, battery temperature, and charging curve. Many compatible 800V EVs can charge from 10 to 80% in about 18 to 22 minutes.
