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Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.


  • (UK) IPA(key): /ˈnɛɡ.ə.wɒt/
  • (US) IPA(key): /ˈnɛɡ.ə.wɑt/
  • (file)


negawatt (plural negawatts)

  1. A unit of saved energy.
    • 24 December 2000, Barbara Whitaker, “New York Times”, in (Please provide the book title or journal name):
      And he has suggested ways to help consumers buy the so-called time-of-use-meters [] so they can benefit from using energy at off-peak times and through "negawatts," or credits for not using power.
    • 7 July 2008, Amory B. Lovins, “The Case For Efficiency”, in Forbes:
      Three-fourths of U.S. electricity--69% of which is used in buildings, nearly all the rest in industry--can be saved for less than the price of just running a coal or nuclear plant. This "negawatt" potential is not just in smarter motors, lights, appliances, etc., but even more in their larger systems.