EV drivers get asked this a lot. Short answer: it depends. Longer answer: with a few rules of thumb, you can estimate it pretty well.
Many higher‑end EVs come with larger batteries for extra range, plus on‑board chargers rated at 11 or 22 kW. On a home wallbox, that’s usually enough to reach 100% by morning. Smaller EVs often pair smaller batteries with 3.7 or 7.4 kW on‑board chargers. The power’s lower, but so is the capacity — so a normal overnight charge still gets you back to full.
Rapid charging focuses on the 20–80% window because it’s the sweet spot for speed. Premium models with modern battery tech can take 150 kW or more from high‑power chargers and hit 80% in under 30 minutes. More affordable cars typically peak around 50–100 kW, so the same 20–80% takes roughly 35–40 minutes.
Cold weather catches newcomers out. A cold battery is reluctant to accept charge. Around freezing, it can take a while — a long motorway run or some preheating — to warm the pack to roughly 30°C. Once it’s up to temperature, those 150 kW‑plus speeds are back on the table.
Another surprise is how long the last 20% takes. From about 80% state of charge, every EV tapers hard — regardless of price or battery size — to protect longevity. The battery management system reduces power to avoid overheating and cell damage.
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