News Release

August 10, 2015

ERCOT system breaks 69,000 MW in hourly peak demand for first time ever

AUSTIN, TX, Aug. 10, 2015 -- For the first time in this grid operator’s history, hourly demand within the Electric Reliability Council of Texas (ERCOT) system today broke the 69,000 MW threshold, with peak demand for electricity reaching 69,877 megawatts (MW)* between 4 and 5 p.m. and 69,408 MW between 3 and 4 p.m.

"The ERCOT system has been performing very well through the triple-digit temperatures we’ve been experiencing," said ERCOT Chief Operating Officer Brad Jones. "Today is no exception as operating reserves remained above 3,000 MW throughout this record peak."

The previous record of 68,912 MW lasted just four days before being bested by Monday’s new all-time high. The system also broke its previous all-time weekend record during six operating hours this past weekend, with demand during the 4-5 p.m. hour on Saturday, Aug. 8, setting the new weekend record of 66,587 MW. One MW is enough to power about 200 homes during periods of peak demand.

"Demand is expected to remain high until temperatures begin to break at the end of the week," Dan Woodfin, ERCOT director of System Operations said. "Our focus continues to be on ensuring we maintain overall reliability and protect the grid while having sufficient generation in place to meet demand."

As this week progresses, ERCOT Meteorologist Chris Coleman anticipates temperatures throughout the ERCOT region will drop slightly. See his weekly forecast here and an updated seasonal forecast here.

Wind generation contributed between 2,000 and 2,400 MW from installed capacity of more than 13,000 MW during today’s peak.

Consumers can monitor ERCOT system conditions at or through the ERCOT Energy Saver mobile app, available free for Apple or Android devices.

Previous All-Time Peak Records*

69,877 MW -- Aug. 10, 2015

68,912 MW -- Aug. 6, 2015

68,459 MW -- Aug. 5, 2015

68,305 MW -- Aug. 3, 2011

67,929 MW -- Aug. 2, 2011

*This official number was updated based on final settlement in the ERCOT market. It replaces the preliminary reported peak of 69,783 MW, which was based on initial operating data.

The Electric Reliability Council of Texas (ERCOT) manages the flow of electric power to more than 25 million Texas customers -- representing about 90 percent of the state’s electric load. As the independent system operator for the region, ERCOT schedules power on an electric grid that connects more than 46,500 miles of transmission lines and 650+ generation units. It also performs financial settlement for the competitive wholesale bulk-power market and administers retail switching for nearly 8 million premises in competitive choice areas. ERCOT is a membership-based 501(c)(4) nonprofit corporation, governed by a board of directors and subject to oversight by the Public Utility Commission of Texas and the Texas Legislature. Its members include consumers, cooperatives, generators, power marketers, retail electric providers, investor-owned electric utilities, transmission and distribution providers and municipally owned electric utilities.