On the E411 last November, I was waiting at the Ionity charger in Spy with an IONIQ 6 at 12%. Across from me, a large German SUV — a beautiful car, 400V — had arrived two minutes before me. It left seven minutes after me. Same charger, same available power, completely different result. Charging speed is not a marketing figure — it determines how much time you spend in a motorway car park.
In 2026, an EV's charging architecture conditions its real-world use as much as its WLTP range. Here's how to read these figures.
Why is peak charging power an incomplete indicator?
The direct answer: the kW shown in the spec sheet is the maximum reached briefly — not the speed maintained during charging.
This peak occurs at the start of a session, battery between 15 and 30%, under ideal temperature conditions. As soon as the battery heats up or the SoC (State of Charge) rises, the BMS (battery management system) progressively reduces power to protect the cells.
What really matters: the charge curve, meaning what power the car maintains from 15% to 75% battery. Over this interval, some EVs stay close to their peak power. Others taper off quickly.
The real indicator to compare: km recovered in 10 minutes of charging. On this criterion, an IONIQ 6 with 220 kW peak recovers more than an EV with 250 kW peak but a less flat curve.
What is the practical difference between 800V and 400V architecture on the motorway?
800V architecture doesn't change the battery chemistry — it changes the voltage of the charging circuit. Physical consequence: for the same current, you transfer twice as much power, without overheating the charging cables.
In practice on Belgian roads:
- 150 kW charger (standard): 400V and 800V EVs both approach the charger's limit. The 800V advantage is marginal.
- 250-350 kW charger (Ionity, Allego HPC): the 400V EV is limited by its own electronics to 170-250 kW. The 800V EV absorbs 220-320 kW. The gap is decisive.
On Belgian motorways in 2026, 150 kW chargers are still in the majority — but major stations (Wépion on the E411, Ghislenghien on the E19, Loncin on the E40) already have 250-350 kW HPC chargers.
220 kW DC · E-GMP 800V · 77.4 kWh battery · Hyundai 2024 data
270 kW DC · PPE 800V · 100 kWh battery · Audi 2024 data
250 kW DC V3 Supercharger · optimised 400V architecture
Which EVs charge fastest in 2026?
Tier 1 — 800V champions (200 kW and above)
Audi RS e-tron GT — 320 kW DC at a compatible charger. PPE 800V platform shared with the Porsche Taycan. Under 20 minutes from 10 to 80% in the best conditions. From €113,000 in Belgium.
Audi Q6 e-tron — 270 kW DC, 21 minutes from 10 to 80% (manufacturer data, 100 kWh battery). The best charging speed-to-versatility ratio in the premium market. From €63,200.
Kia EV6 / Hyundai IONIQ 6 — 233 kW and 220 kW DC respectively. E-GMP 800V platform. Ten to 80% in 18 minutes for the IONIQ 6 — the accessible benchmark from €44,490 in Belgium.
Tier 2 — Fast but 400V (150-250 kW)
Tesla Model 3 — 250 kW on the proprietary V3 Supercharger. At Ionity or Allego, real power drops to 170-200 kW depending on the charger. In 2026, the Belgian Supercharger network covers the main routes well — which offsets the technical limitation through operational reliability.
BMW i5 — 205 kW DC. Highly optimised 400V architecture, one of the flattest charge curves in its category. Around 30 minutes from 10 to 80%.
Tier 3 — Under 150 kW DC
Skoda Enyaq iV80, VW ID.4 Pro — 135 kW DC. Adequate if you depart with 300+ km of real range and only charge once per trip. Less suited to long journeys with frequent stops.
| Modèle | Prix | Autonomie réelle | Batterie | Recharge DC |
|---|---|---|---|---|
| Hyundai IONIQ 6Recommandé | 44 990 € | 480 km | 77.4 kWh | 220 kW |
| Audi Q6 e-tron | 74 900 € | 481 km | 100 kWh | 270 kW |
| Tesla Model 3 | 42 990 € | 380 km | 60 kWh | 170 kW |
| Kia EV6 | 44 990 € | 420 km | 77.4 kWh | 233 kW |
IONIQ 6 vs Q6 e-tron vs Model 3: real-world Belgian comparison
On a Brussels–Belgian Coast trip with one outbound charge at the Ionity station in Veurne:
IONIQ 6: 18 min to recover 250 km of real range. Perfect for this trip, boot full, two kids.
Q6 e-tron: 21 min to recover ~280 km. Slightly slower, but larger battery (100 kWh) — on longer trips, the number of stops is reduced.
Model 3: 22-25 min at a V3 Supercharger. The Ghent Supercharger is on the Brussels–Coast route — no detour. Ultra-smooth experience with integrated navigation that pre-conditions the battery. Slightly slower than the 800V cars, but never broken down.
Fast charging on the motorway is 18 minutes of coffee, not 45 minutes of stress watching a percentage. 800V EVs have solved this problem. Well-optimised 400V cars come close. The rest — it depends on your patience, and whether the charger is actually working.
Which model to choose for your profile?
You regularly do Brussels–Paris, Brussels–Ardennes or Brussels–Coast: IONIQ 6 or Q6 e-tron. 800V architectures, unbeatable charging speeds under €100,000.
You want the most reliable charging network: Tesla Model 3. The Belgian Supercharger network is dense, fast, and rarely breaks down — a decisive criterion when the public charger in Vedrin is out of order.
Budget under €50,000, regular long trips: IONIQ 6. 480 km real range, 220 kW DC, proven 800V architecture.
Long range + fast charging for the fewest possible stops: Q6 e-tron. 100 kWh battery + 270 kW DC = the fewest constraints in its category on long-distance trips.
Le verdict de Christophe F.
In 2026, the Hyundai IONIQ 6 remains the accessible benchmark for fast charging: 220 kW DC, 18 minutes from 10 to 80%, proven 800V architecture, from €44,490. The Audi Q6 e-tron beats it on peak power (270 kW) and battery capacity, but costs €20,000 more — justified if you regularly make trips over 400 km. Tesla Model 3 is a special case: technically behind on pure charging speed, but its Supercharger network more than compensates in real Belgian use. If you charge mostly at home or at the office, DC charging speed matters little — it's for long trips that the ranking above truly changes your life.