Reference boundary

Simple energy-time estimate only. Real charging time depends on vehicle limits, charge taper, losses, temperature, and starting state of charge.

Reference table

Estimate simple EV charging time from battery energy and charger power.

Formula basis: charging hours = battery kWh / charger kW before losses and charge taper.
Battery energy (kWh)3.8 kW7.7 kW9.6 kW11.5 kW
4010.55.24.23.5
6015.87.86.35.2
8021.110.48.37
10026.31310.48.7
Use notes
  • Use this table for preliminary reference and arithmetic checks only.
  • Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.