peaker
n.β Β«The $60 million, 170 megawatt plant will be built near Mountain Home, Idaho, and used for whatβs called a peaker plant. Peakers are relied on when peak summer demand is pushed by air conditioners and irrigation pumps and forces utilities to cover their demand with an idle unit instead of purchasing it from the more expensive wholesale spot market.Β» ββIdaho Power gets OK for βpeakerβ plant” in Boise, Idaho Earthtimes.org Dec. 21, 2006. (source: Double-Tongued Dictionary)