GlenCalc

EV charging calculator

Level 2 home chargers are usually 7 to 11 kW; DC fast chargers slow down above about 80%.

Your answer

Charging time6 h 35 min
Cost$8.50
Energy added to the battery45 kWh
Energy from the grid50 kWh
  • Fast chargers taper above about 80%, so the last part takes longer than this estimate.

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How we worked it out

Updated as you change the numbers.

  1. Energy = battery × (to − from). Grid energy = energy ÷ efficiency. Time = grid energy ÷ charger kW.

Method and assumptions

The car’s onboard charger may limit AC charging below the charger’s rating; use the lower of the two.

Questions

How long to charge a 75 kWh EV from 20 to 80% on a 7.6 kW charger?

About 6 h 35 min, costing about $8.50 at 17¢ per kWh.

Sources

Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

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