Member Companies

TCPA members provide more than 43,000 megawatts of installed capacity to the ERCOT/Texas market–that’s more than 70 percent of the total net operable electric generating capacity in ERCOT. They represent billions of dollars of investment in the state, and they employ thousands of Texans.


Calpine owns natural gas and geothermal generation as well as retail businesses. The company serves customers in Texas as well as along both the east and west coasts of the U.S. and Mexico. Calpine is headquartered in Houston, Texas.

Natural Gas (TX)

Baytown Energy Center – Baytown: 896 MW
Bosque Energy Center – Laguna Park: 762 MW
Channel Energy Center – Houston: 808 MW
Corpus Christi Energy Center – Corpus Christi: 500 MW
Deer Park Energy Center – Deer Park: 1,204 MW
Freeport Energy Center – Freeport: 236 MW
Freestone Energy Center – Freestone County: 779 MW
Guadalupe Energy Center – Marion: 1,009 MW
Hidalgo Energy Center – Edinburg: 477 MW
Jack A. Fusco Energy Center – Richmond: 609 MW
Magic Valley Generating Station – Edinburg: 712 MW
Pasadena Power Plant – Pasadena: 781 MW
Texas City Power Plant – Texas City: 453 MW

Wind (TX)

400 MW currently under development


Exelon is one of the largest competitive U.S. power generators, with more than 32,700 megawatts of nuclear, gas, wind, solar and hydroelectric generating capacity comprising one of the nation’s cleanest and lowest-cost power generation fleets. Exelon’s Constellation business unit provides energy products and services to approximately 2 million residential, public sector and business customers, including more than two-thirds of the Fortune 100.

Natural Gas (TX)

Colorado Bend II – Wharton County: 1,088 MW
Handley Generating Station – Tarrant County: 1,265 MW
Wolf Hollow II – Hood County: 1,069 MW

Wind (TX)

Sendero – Jim Hogg & Zapata Counties: 78 MW
Whitetail – Webb County: 91.2 MW


Vistra Corp. owns Luminant, a competitive power generation business, including mining, wholesale marketing and trading, and development operations. Luminant has more than 18,300 megawatts of generation in Texas, powered by a diverse portfolio of natural gas, nuclear, coal, solar, and battery storage facilities. In addition, TXU Energy is a retail electric provider that is also a subsidiary of Vistra Corp.. Luminant is headquartered in Irving, Texas.

Natural Gas (TX)

Ennis Energy Facility – Ennis: 366 MW
Forney Power Plant – Forney: 1,912 MW
Midlothian Energy Facility – Midlothian: 1,596 MW
Hays Energy Facility – San Marcos: 1,047 MW
Lamar Power Plant – Paris: 1,076 MW
Odessa-Ector Power Plant – Odessa: 1,054 MW
Graham Power Plant – Graham: 630 MW
Lake Hubbard Power Plant – Dallas: 921 MW
DeCordova Power Plant – Granbury: 260 MW
Morgan Creek Power Plant – Colorado City: 390 MW
Permian Basin Power Plant – Monahans: 325 MW
Stryker Creek Power Plant – Rusk: 685 MW
Trinidad Power Plant – Trinidad: 244 MW
Wharton County Energy Facility – Boling: 83 MW
Wise Energy Facility – Poolville: 787 MW

Nuclear (TX)

Comanche Peak Nuclear Power Plant – Glen Rose: 2,300 MW

Coal (TX)

Martin Lake Power Plant – Tatum: 2,250 MW
Oak Grove Power Plant – Franklin: 1,600 MW
Coleto Creek Power Station – Goliad: 650 MW

Solar / Battery Storage (TX)

Upton 2 Solar Plant – Upton County: 180 MW (includes 10 MW / 42 MWh lithium-ion battery storage system)


NRG owns generation as well as several retail electric providers (REPs) and operates in Texas as well as around the world. Its affiliates provide demand response services as well as energy efficiency and other load control management tools. NRG’s generation portfolio includes natural gas, coal, nuclear, and renewable resources. Generation facilities are located in the northeast, Texas, Louisiana, Nevada, California, and Illinois as well as in Turkey, Guam, and Australia. NRG is headquartered in Houston, Texas as well as Princeton, New Jersey.

Natural Gas (TX)

Cottonwood – Deweyville: 1,263 MW
Cedar Bayou – Eldon: 1,495 MW
Cedar Bayou 4 – Eldon: 249 MW
Greens Bayou – Houston: 344 MW
Gregory – Gregory: 388 MW
Petra Nova – Thompsons: 22 MW
San Jacinto – La Porte: 162 MW
TH Wharton – Houston: 1,025 MW
WA Parish (Natural Gas) – Thompsons: 1,145 MW

Nuclear (TX)

South Texas Project – Bay City: 1,136 MW

Coal (TX)

Limestone – Jewett: 1,689 MW
WA Parish (Coal) – Thompsons: 2,504 MW

Wind (TX)

Sherbino – Pecos County: 75 MW

Shell Energy North America (US), L.P.

Shell Energy, an indirect subsidiary of Royal Dutch Shell, is an energy marketer and trader. With regional offices throughout the US and Canada, Shell Energy and its subsidiaries trade and market natural gas, power, environmental and risk management products in North and South America. It has affiliates that market and trade the same commodities in other parts of the world. Shell Energy’s customers include local gas distribution companies, electric utilities, independent power producers, energy retailers, oil and gas producers, municipalities, rural electric cooperatives, and large commercial and industrial users. Its commercial activities in the electric markets include full requirements service to electric utilities, natural gas and electric supply for competitive retail suppliers and a variety of services and products for electric generators, such as natural gas supply, energy and asset management transactions, tolling arrangements with terms as long as 20 years and power purchase arrangements to support merchant renewable facility development, such as wind, solar farms and battery storage. Shell acquired MP2, a demand response and retail electric provider, and maintained its headquarters in The Woodlands, Texas.

Talen Energy

Talen generates and sells electricity, capacity and related products from a fleet of power plants that uses diverse fuel sources: carbon-free nuclear, clean and flexibly dispatched natural gas, efficient coal. They operate primarily in the northeast and Texas. Talen has a competitive wholesale and retail supply business that buys and sells energy commodities in competitive wholesale and deregulated retail markets throughout the country. They serve commercial and industrial customers in New Jersey, Pennsylvania, Maryland, Delaware, Ohio, and the District of Columbia. Talen’s headquarters are in The Woodlands, TX with a Co-Center in Allentown, PA.

Natural Gas (TX)

Barney Davis Power Plant – Corpus Christi: 933 MW
Laredo Power Plant – Laredo: 177 MW
Nueces Bay 7 Power Plant – Corpus Christi: 633 MW


With offices and power plants across the United States and Canada, Tenaska affiliates provide the following services: independent power plant development, ownership and operations; natural gas and electric power marketing; energy risk management; asset acquisition and electric transmission systems management and development. The company has: $3.7 billion in total assets; completed over 10,000 MW in power plant development; ~58,000 MW in energy management service contracts; 6,804 MW in managed plant capacity; and sells or manages ~9.5 BCF/day of natural gas throughout the United States. Power marketing affiliate Tenaska Power Services Co. is headquartered in Arlington, Texas and Tenaska’s Strategic Development & Acquisitions Group and natural gas marketing affiliate, Tenaska Marketing Ventures, have regional offices in Arlington. Tenaska has developed 17 power plants, including its very first in Paris, Texas. A plant in Oklahoma also is also capable of serving Texas’ ERCOT market.

Natural Gas (TX)

Tenaska Frontier Generating Station – Grimes County: 830 MW
Tenaska Gateway Generating Station – Rusk County: 845 MW
Kiowa Power Partners – Pittsburg County (OK) serves ERCOT market: 1,220 MW