negawattn.
/ˈnɛɡəwɒt/, U.S. /ˈnɛɡəˌwɑt/ A unit of electrical or other energy (typically measured in watts or kilowatts) saved as a result of energy conservation measures.
ΚΠ
1984 Business Week (Industr. ed.) (Nexis) 23 July 96 l If I (use) an 18-watt light bulb (to replace) a 75-watt bulb, the 57 ‘negawatts’ of unused electricity are in effect dispatched back to the utility to sell to someone else.
1988 Energy User News (Nexis) 9 May 10 A utility should pay for a saved kilowatt-hour just as it pays for a generated kilowatt-hour. Enter the Negawatt, or saved kilowatt.
1990 Population & Devel. Rev. 16 (Suppl.) 101 These new methods include..making electrical savings fungible..making spot, future, and options markets in ‘negawatts’.
1995 Independent 20 May 6/1 By saving electricity, or cutting down on driving and shopping trips, for example, consumers will generate negawatts, negamiles and negatrips.
This is a new entry (OED Third Edition, September 2003; most recently modified version published online March 2022).
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n.1984