Battery & EV
EV Charging Time
Calculate electric vehicle charging time based on charger power
kWh
kW
%
%
%
Typically 88–95% for AC charging
Charging time
Energy needed (in battery)45 kWh
Energy drawn from wall48,91 kWh
Charging time4 h 27 min4,45 h
With DC fast charging, actual time may differ as the charger tapers current at high SoC.
How does it work?
EV charging time depends on three main factors: battery size (kWh), current state of charge (SoC), and charger power (kW).
Common charger types:
- Schuko socket 230V/10A: ~2.3 kW — very slow, for overnight emergency
- Type 2 single-phase: ~3.7–7.4 kW
- Type 2 three-phase 11 kW: most common home/workplace charger
- Type 2 three-phase 22 kW: not all cars support this
- DC fast (CCS/CHAdeMO) 50–350 kW: motorway and public chargers
Efficiency losses: AC charging through the onboard charger (OBC) is typically 88–95% efficient.
Example
Example: Tesla Model 3 (75 kWh), 20% → 80%, 11 kW charger, 92% efficiency.
Energy needed: 75 × 0.60 = 45 kWh
Wall energy: 45 / 0.92 = 48.9 kWh
Time: 48.9 / 11 = 4 h 27 min
Same charge with DC 50 kW: 48.9 / 50 ≈ 59 min
Assumptions
- •DC fast charger efficiency is also modelled at the entered efficiency percentage
- •DC charging tapers above ~80% SoC — this is not modelled here
- •Charger power is assumed to be fully available (no grid constraints)