21 kWh EV Battery Charging Time on 50 kW (CCS / CHAdeMO DC Fast Charger)
Real-world charging duration (10–80%, 20–80%, and 0–100%), range added per hour, charging cost, and electrical circuit breaker sizing.
10% to 80% Charge Time21 min20%–80%: 18 min
Full 0% to 100% Time36 minGrid Energy: 22.8 kWh
Driving Range Added / Hour+262.7 km/h+163.2 miles / hour
Circuit Breaker Required100A (NEC)72.2A @ 400V (3P)
Charging Time & Electrical Specification Table (21 kWh @ 50 kW)
| EV Battery Usable Capacity | 21 kWh |
| Charger Output Rating | 50 kW (CCS / CHAdeMO DC Fast Charger) |
| 10% to 80% Charging Time (Daily / Highway Optimal) | 21 min (0.35 hours) |
| 20% to 80% Charging Time | 18 min (0.3 hours) |
| 0% to 100% Full Charge Time (with BMS Tapering) | 36 min (0.6 hours) |
| Estimated Full Charge Cost (US / Germany / Sweden) | $3.99 (US) · €7.75 (DE) · 37.62 kr (SE) |
| Continuous Current Draw & Breaker | 72.2 A @ 400V (3-Phase) → 100A NEC / 80A IEC Breaker |
Frequently Asked Questions
How long does it take to charge a 21 kWh EV battery at 50 kW?
Charging a 21 kWh electric vehicle battery from 10% to 80% on a 50 kW (CCS / CHAdeMO DC Fast Charger) takes approximately 21 min (or 36 min for a full 0% to 100% charge including charger efficiency and BMS tapering).
What breaker size is required for a 50 kW EV charger?
At 400V (3-Phase), a 50 kW charger draws 72.2A continuously, requiring a 100A breaker under US NEC 625.41 (125% continuous load rule) or a 80A breaker under European IEC/NEK standards.
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