Units
Kilowatt-Hour (kWh)
The standard unit of electrical energy — using 1 kW for one hour.
Definition
A kilowatt-hour (kWh) is the amount of energy consumed by a 1 kW load operating for one hour.
Detailed explanation
kWh measures total energy consumption over time and is the basis for the energy (commodity) portion of your bill. Ten 100-watt bulbs running for one hour use 1 kWh.
Why it matters
The commodity price you procure is usually quoted per kWh, making it the number most directly affected by your supply contract.
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