Excludes off-grid photovoltaics and other generators not connected to the distribution or transmission systems. Totals may not equal sum of components due to independent rounding. Data for 1998 and 1999 are model results and may differ slightly from official EIA data reports. Net summer capability has been estimated for nonutility generators for AEO2001. Net summer capability is used to be consistent with electric utility capacity estimates.
Additional retirements are determined on the basis of the size and age of the units.