Peaker plants only run when there is high electricity demand on the grid, and are typically natural gas plants that can be ramped up quickly and have lower fuel costs (for the time being, due to the low cost of natural gas).
Halaman Peaker tatakbo lamang kapag mayroong mataas na demand koryente sa grid, at karaniwang mga halaman natural gas na maaaring ramped up nang mabilis at may mas mababang mga gastos sa gasolina (para sa pansamantala, dahil sa mababang gastos ng natural na gas).