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kilowatt vs. kilowatt-hour

kilowatt
[kil-uh-wot] / ˈkɪl əˌwɒt /

noun

  1. a unit of power, equal to 1000 watts. kW, kw

kilowatt-hour
[kil-uh-wot-auuhr, -au-er] / ˈkɪl əˌwɒtˈaʊər, -ˈaʊ ər /

noun

  1. a unit of energy, equivalent to the energy transferred or expended in one hour by one kilowatt of power; approximately 1.34 horsepower-hours. kWh, K.W.H., kwhr