Table 4.4. Existing Capacity by Producer Type, 2012 (Megawatts)

Producer Type Number of Generators Generator Nameplate Capacity Net Summer Capacity Net Winter Capacity
Electric Power Sector
Electric Utilities 9,624 680,592 621,785 644,358
Independent Power Producers, Non-Combined Heat and Power Plants 6,148 412,045 374,964 389,349
Independent Power Producers, Combined Heat and Power Plants 609 39,916 35,266 38,023
Total 16,381 1,132,554 1,032,015 1,071,729
Commercial and Industrial Sectors
Commercial Sector 962 3,610 3,223 3,349
Industrial Sector 1,680 31,832 27,795 29,381
Total 2,642 35,442 31,018 32,730
All Sectors
Total 19,023 1,167,995 1,063,033 1,104,459

Notes: In 2011, EIA corrected the NAICS codes of several plants which resulted in a net capacity shift from the electric utility sector to the commercial sector.
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.'