kW-hr

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Definition

Noun: - A unit of energy: A kilowatt-hour (kW·h) is a derived unit of energy equal to the amount of work done or energy consumed when a power of one thousand watts (1 kW) operates for one hour.

Usage

The term is used as a standard measurement for electrical energy consumption, particularly by utilities for billing purposes. - The average household consumes several hundred kilowatt-hours of electricity each month. - This appliance uses 1.5 kilowatt-hours of energy if run continuously for three hours at 500 watts.

Advanced Usage
  • In technical and scientific contexts: The kilowatt-hour is commonly used in electrical engineering, physics, and energy management to quantify energy transfer, generation, or usage over time.
    • The solar panel array generated 850 kW·h last week.
Variants and Related Words
  • Kilowatt-hour: This is the full, standard spelling of the unit. The abbreviation "kW·h" or "kWh" is frequently used.
  • Watt-hour (W·h): A smaller unit of energy, where 1 kW·h = 1000 W·h.
  • Megawatt-hour (MW·h): A larger unit of energy, where 1 MW·h = 1000 kW·h.
Synonyms
  • Unit of electricity: A common informal synonym in contexts like utility billing.
    • My bill is high because I used so many units last month.
Notes on Meaning

This term refers specifically to a unit of energy, not power. Power (measured in watts or kilowatts) is the rate at which energy is used or generated. The kilowatt-hour measures the total amount of energy used over a period.

Noun
  1. a unit of energy equal to the work done by a power of 1000 watts operating for one hour

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