108 kWh EV Battery Charging Time on 300 kW (800V Hypercharger DC)
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 Time18 min20%–80%: 15 min
Full 0% to 100% Time31 minGrid Energy: 117.4 kWh
Driving Range Added / Hour+1576.0 km/h+979.3 miles / hour
Circuit Breaker Required600A (NEC)433.0A @ 400V (3P)
Charging Time & Electrical Specification Table (108 kWh @ 300 kW)
| EV Battery Usable Capacity | 108 kWh |
| Charger Output Rating | 300 kW (800V Hypercharger DC) |
| 10% to 80% Charging Time (Daily / Highway Optimal) | 18 min (0.3 hours) |
| 20% to 80% Charging Time | 15 min (0.26 hours) |
| 0% to 100% Full Charge Time (with BMS Tapering) | 31 min (0.51 hours) |
| Estimated Full Charge Cost (US / Germany / Sweden) | $20.54 (US) · €39.92 (DE) · 193.71 kr (SE) |
| Continuous Current Draw & Breaker | 433.0 A @ 400V (3-Phase) → 600A NEC / 450A IEC Breaker |
Frequently Asked Questions
How long does it take to charge a 108 kWh EV battery at 300 kW?
Charging a 108 kWh electric vehicle battery from 10% to 80% on a 300 kW (800V Hypercharger DC) takes approximately 18 min (or 31 min for a full 0% to 100% charge including charger efficiency and BMS tapering).
What breaker size is required for a 300 kW EV charger?
At 400V (3-Phase), a 300 kW charger draws 433.0A continuously, requiring a 600A breaker under US NEC 625.41 (125% continuous load rule) or a 450A breaker under European IEC/NEK standards.
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