What is the difference between kW and kWh when charging an EV?
Charging stations advertise kW, batteries are described in kWh, and bills usually charge per kWh. Which number belongs in a charging-time or cost calculation?
EVVerity explains
The answer
Power versus energy
kW is a rate of energy transfer; kWh is an amount of energy. A constant 7 kW for two hours would deliver 14 kWh at the measurement point. Multiply energy by a price per kWh for cost. Divide energy by average power for time, keeping losses and changing power separate.
About this editorial content
Prepared with AI assistance for EVVerity. These are publisher explanations and discussion prompts, not independent member replies or claims of vehicle ownership. Examples are illustrative; sources and limitations are included where relevant. Read our editorial approach.
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