Table 4.4. Existing Capacity by Producer Type, 2013 (Megawatts)

Producer Type Number of Generators Generator Nameplate Capacity Net Summer Capacity Net Winter Capacity
Electric Power Sector
Electric Utilities 9,463 674,828 616,799 639,350
Independent Power Producers, Non-Combined Heat and Power Plants 6,502 413,993 377,298 391,014
Independent Power Producers, Combined Heat and Power Plants 588 39,729 34,871 37,567
Total 16,553 1,128,549 1,028,969 1,067,931
Commercial and Industrial Sectors
Commercial Sector 1,042 3,947 3,551 3,682
Industrial Sector 1,648 31,526 27,544 29,160
Total 2,690 35,473 31,095 32,841
All Sectors
Total 19,243 1,164,022 1,060,064 1,100,772

See Glossary reference for definitions.
Totals may not equal sum of components because of independent rounding.
In the case of some wind, solar and wave energy sites, the capacity for multiple generators is reported in a single generator record and is presented as a single generator in the generator count.
Capacity by energy source is based on the capacity associated with the energy source reported as the most predominant (primary) one, where more than one energy source is associated with a generator.
Source: U.S. Energy Information Administration, Form EIA-860, 'Annual Electric Generator Report.'