On What Is The Hybri we explain why a 350 kW charger does not add 350 kW to your car. The car, not the charger, decides the rate. A 2022 Chevy Bolt with a 65 kWh pack tops out at ~55 kW on a DC fast charger. A 2024 Hyundai Ioniq 5 with an 84 kWh pack can take 220+ kW. The difference is the car's onboard charger and thermal management, not the stall.
Level 2 charging (240V, 7–11 kW typical home)
| Battery size | Miles added per hour | Time to add 100 miles | Time for full charge (10–90%) |
|---|---|---|---|
| 40 kWh (small EV / large PHEV) | 25–30 mi/hr | 3.5–4 hours | 5–6 hours |
| 60 kWh (compact EV) | 25–30 mi/hr | 3.5–4 hours | 7–8 hours |
| 80 kWh (mid-size EV / SUV) | 25–30 mi/hr | 3.5–4 hours | 9–10 hours |
| 100+ kWh (large SUV / truck) | 25–30 mi/hr | 3.5–4 hours | 11–13 hours |
DC fast charging (50–350 kW public)
DC fast charging curves are not linear. A 150 kW charger might deliver 120 kW at 20% SOC, 80 kW at 50% SOC, and 30 kW at 80% SOC. The car tapers current to keep cell temperature in the safe zone. That is why "10–80%" is the standard benchmark — the last 20% is where speed drops off a cliff.
| Car + battery | Peak DC speed | 10–80% time | Miles added in 30 min |
|---|---|---|---|
| Tesla Model 3 LR (82 kWh) | 250 kW | ~25 min | ~150 mi |
| Hyundai Ioniq 5 (84 kWh) | 220 kW | ~28 min | ~140 mi |
| Ford Mustang Mach-E (91 kWh) | 150 kW | ~35 min | ~100 mi |
| Chevy Bolt (65 kWh) | 55 kW | ~60 min | ~50 mi |
Why the last 20% is slow
- Lithium-ion cells charge fastest between 20–50% SOC. Above 80%, the charger reduces current to avoid lithium plating and heat buildup.
- A 30-minute stop at 50% SOC adds more miles than a 30-minute stop at 80% SOC. Plan your breaks accordingly.
- Cold weather slows charging further — some cars precondition the battery on the way to the charger; others do not. Check the app for "preconditioning" or "battery warmer" before you arrive.
Next reads on What Is The Hybri
Charging curves vary by temperature, battery health, and software version. The numbers above are typical for a 70–80°F day with a healthy battery. Cold weather, a degraded pack, or a software limit can cut speeds in half.