Worked example
A 60 kWh battery charged from 20% to 80% on a 7.4 kW home charger at 90% efficiency takes roughly 5 hours 24 minutes.
Frequently asked questions
Why can rapid charging take longer than this estimate?
Charging curves taper power at higher battery percentages and can vary with temperature.
Does the charger always deliver its advertised power?
No. The car, supply and charger can all limit the actual rate.