Charging Speed
The kW figure on a rapid charger is the maximum the cabinet can deliver — not the speed your car will actually pull. Real-world DC charging speed depends on your state of charge, battery temperature, and the charge curve your vehicle was designed for. This guide breaks down what to expect at 50kW, 150kW and 350kW stalls, with real numbers from popular 2025–2026 EVs.
Every rapid charger has a number on the side — 50kW, 150kW, 350kW. That figure is the maximum DC power the cabinet can deliver at the connector under ideal conditions. It is a ceiling, not a promise.
In practice three things decide how much of that ceiling you'll actually get: your car's own peak charging rate, the current state of charge (SoC) of your battery, and the temperature of the pack. Most EVs sold in the UK, France, Italy and Australia today peak somewhere between 100kW and 250kW, and only at a narrow band of SoC — typically 10% to 40%.
That means a 350kW stall isn't seven times faster than a 50kW one for the average EV. For a Renault Megane E-Tech that peaks around 130kW, plugging into a 350kW stall gives you exactly the same speed as a 150kW stall. The extra power is wasted capacity.
The fastest, fairest way to compare chargers is the 10→80% window — this is the part of the curve where peak power is sustained and where you'll spend most of your road-trip stops. Above 80%, every modern EV throttles hard to protect the cells.
The table below shows realistic 10→80% times for four popular models on cabinets of different power levels, assuming a pre-warmed battery and a non-shared stall. Real-world times can be 10–20% longer if the battery is cold or the stall is power-shared with the bay next to you.
| EV | Peak DC kW | 50kW stall | 150kW stall | 350kW stall |
|---|---|---|---|---|
| Tesla Model 3 LR (2025) | 250 kW | ~62 min | ~27 min | ~22 min |
| Hyundai Ioniq 5 (77 kWh) | 235 kW | ~70 min | ~28 min | ~18 min |
| BYD Atto 3 | 88 kW | ~55 min | ~37 min | ~37 min |
| Renault Megane E-Tech (60 kWh) | 130 kW | ~52 min | ~30 min | ~30 min |
Figures are typical observed values, not manufacturer best-case. Cold weather, high SoC arrival, or a power-shared stall will all extend the session.
Every EV charges along a curve, not a flat line. The pack starts at a moderate rate, ramps to a peak somewhere between 10% and 30% SoC, holds that peak for a short window, then tapers as the cells fill. By the time you hit 80% the rate has usually dropped below 50kW even on the fastest cars.
This is why charging from 10→80% takes roughly the same wall time as 80→100% on most EVs, despite covering ten times more kWh. On a long trip, doing two 20→70% stops is almost always faster than one 10→100% stop.
DC fast charging is fundamentally a thermal problem. Lithium cells need to be warm — typically 25–35°C — to accept high current safely. A cold pack physically cannot take 250kW; the battery management system will throttle hard to protect the cells.
Most modern EVs include battery preconditioning: ask the in-car navigation to route to a fast charger and the car will start warming the pack 15–30 minutes before arrival. On a Hyundai Ioniq 5 in 0°C ambient, preconditioning is the difference between a 28-minute stop and a 55-minute one. See our winter range guide for the full cold-weather playbook.
The honest answer: pick by reliability and price, not peak kW. If your car peaks at 150kW, a 150kW Ionity stall delivers identical speed to a 350kW one. Save the high-power stalls for vehicles that can use them — the next Ioniq 5 driver will thank you.
Use the connector and power filters on any station page on EV Charge Routes to match cabinets to your car. Cross-check our networks directory for typical reliability and pricing in your region. For an at-a-glance view of which plug your car takes, see connector types.
| Your car's peak DC | Best stall to choose | Why |
|---|---|---|
| ≤ 100 kW | 50 kW or 150 kW | Anything faster is wasted; 50 kW often costs less per kWh |
| 100–180 kW | 150 kW | Hits your peak without occupying premium 350 kW bays |
| 180–270 kW | 150 kW or 350 kW | 350 kW only helps if it's a true 350 kW bay, not power-shared |
| 270 kW+ (e.g. 800 V cars) | 350 kW | Only 350 kW cabinets can feed an 800 V pack at full speed |
Network coverage and pricing vary widely by region, which often matters more than peak kW.
In the UK, the motorway network is dominated by Gridserve, InstaVolt and Ionity, with typical ad-hoc pricing around £0.69–0.85/kWh. France is dense with Ionity, TotalEnergies, Tesla (open to non-Tesla) and Allego, often €0.39–0.69/kWh. Italy has a strong Enel X Way and Ionity presence on the autostrade, plus a fast-growing Be Charge footprint. Australia's east-coast spine is Evie Networks, Chargefox and Tesla Superchargers — pricing typically AU$0.55–0.79/kWh.
If you remember nothing else from this guide, remember this short checklist for every rapid stop.
Put this into practice
