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kilowatt-hour a unit of electrical energy equal to one kilowatt operating for one hour. (abbr.: kwh, kWh)
kw abbreviation of "kilowatt," or "kilowatts," a unit of electrical power equal to one thousand watts.
kwh abbreviation of "kilowatt-hour," or "kilowatt-hours," a unit of electrical energy equal to one kilowatt operating for one hour.