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Solar surpasses coal to become ERCOT’s third-largest power source in 2025

by the numbers

Solar represented 14 percent of energy supplied to the ERCOT electric grid in 2025. Photo via bp.com

Solar barely eclipsed coal to become the third biggest source of energy generated for the Electric Reliability Council of Texas (ERCOT) in 2025, according to new data.

In 2024, solar represented 10 percent of energy supplied to the ERCOT electric grid. Last year, that number climbed to 14 percent. During the same period, coal’s share remained at 13 percent.

From the largest to smallest share, here’s the breakdown of other ERCOT energy sources in 2025 compared with 2024:

  • Combined-cycle gas: 33 percent, down from 35 percent in 2024
  • Wind: 23 percent, down from 24 percent in 2024
  • Natural gas: 8 percent, down from 9 percent in 2024
  • Nuclear: 8 percent, unchanged from 2024
  • Other sources: 1 percent, unchanged from 2024

Combined, solar and wind accounted for 37 percent of ERCOT energy sources.

Looking ahead, solar promises to reign as the star of the ERCOT show:

  • An ERCOT report released in December 2024 said solar is on track to continue outpacing other energy sources in terms of growth of installed generating capacity, followed by battery energy storage.
  • In December, ERCOT reported that more than 11,100 megawatts of new generating capacity had been added to its grid since the previous winter. One megawatt of electricity serves about 250 homes in peak-demand periods. Battery energy storage made up 47 percent of the new capacity, with solar in second place at 40 percent.

The mix of ERCOT’s energy is critical to Texas’ growing need for electricity, as ERCOT manages about 90 percent of the electric load for the state, including the Houston metro area. Data centers, AI and population growth are driving heightened demand for electricity.

In the first nine months of 2025, Texas added a nation-leading 7.4 gigawatts of solar capacity, according to a report from data and analytics firm Wood Mackenzie and the Solar Energy Industries Association.

“Remarkable growth in Texas, Indiana, Utah and other states ... shows just how decisively the market is moving toward solar,” says Abigail Ross Hopper, president and CEO of the solar association.

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NRG Energy has partnered with Sunrun to grow its virtual power plant and support the ERCOT grid. Photo via Pexels.

NRG makes latest partnership to grow virtual power plant

VPP partners

Houston-based NRG Energy recently announced a new long-term partnership with San Francisco-based Sunrun that aims to meet Texas’ surging energy demands and accelerate the adoption of home battery storage in Texas. The partnership also aligns with NRG’s goal of developing a 1-gigawatt virtual power plant by connecting thousands of decentralized energy sources by 2035.

Through the partnership, the companies will offer Texas residents home energy solutions that pair Sunrun’s solar-plus-storage systems with optimized rate plans and smart battery programming through Reliant, NRG’s retail electricity provider. As new customers enroll, their stored energy can be aggregated and dispatched to the ERCOT grid, according to a news release.

Additionally, Sunrun and NRG will work to create customer plans that aggregate and dispatch distributed power and provide electricity to Texas’ grid during peak periods.

“Texas is growing fast, and our electricity supply must keep pace,” Brad Bentley, executive vice president and president of NRG Consumer, said in the release. “By teaming up with Sunrun, we’re unlocking a new source of dispatchable, flexible energy while giving customers the opportunity to unlock value from their homes and contribute to a more resilient grid

Participating Reliant customers will be paid for sharing their stored solar energy through the partnership. Sunrun will be compensated for aggregating the stored capacity.

“This partnership demonstrates the scale and strength of Sunrun’s storage and solar distributed power plant assets,” Sunrun CEO Mary Powell added in the release. “We are delivering critical energy infrastructure that gives Texas families affordable, resilient power and builds a reliable, flexible power plant for the grid.”

In December, Reliant also teamed up with San Francisco tech company GoodLeap to bolster residential battery participation and accelerate the growth of NRG’s virtual power plant network in Texas.

In 2024, NRG partnered with California-based Renew Home to distribute hundreds of thousands of VPP-enabled smart thermostats by 2035 to help households manage and lower their energy costs. At the time, the company reported that its 1-gigawatt VPP would be able to provide energy to 200,000 homes during peak demand.

ERCOT plans to build a “super highway” of new transmission lines to boost grid reliability. Photo via Getty Images

ERCOT approves $9.4B project to improve grid, meet data center demand

power project

The Electric Reliability Council of Texas, which manages the electric grid for 90 percent of Texans, is undertaking a $9.4 billion project to improve the reliability and efficiency of statewide power distribution. The initiative comes as ERCOT copes with escalating demand for electricity from data centers and cryptocurrency-mining facilities.

The project, approved Dec. 9 by ERCOT’s board, will involve building a 1,109-mile “super highway” of new 765-kilovolt transmission lines. One kilovolt equals 1,000 volts of electricity.

According to the Hoodline Dallas news site, the $9.4 billion project represents the five- to six-year first phase of ERCOT’s Strategic Transmission Expansion Plan (STEP). Hoodline says the plan, whose price tag is nearly $33 billion, calls for 2,468 miles of new 765-kilovolt power lines.

STEP will enable ERCOT to “move power longer distances with fewer losses,” Hoodline reports.

Upgrading the ERCOT grid is a key priority amid continued population growth in Texas, along with the state’s explosion of new data centers and cryptocurrency-mining facilities.

ERCOT says about 11,000 megawatts of new power generation capacity have been added to the ERCOT grid since last winter.

But in a report released ahead of the December board meeting, ERCOT says it received 225 requests this year from large power users to connect to its grid — a 270 percent uptick in the number of megawatts being sought by mega-users since last December. Nearly three-fourths (73 percent) of the requests came from data centers.

Allan Schurr, chief commercial officer of Houston-based Enchanted Rock, a provider of products and services for microgrids and onsite power generation, tells Energy Capital that the quickly expanding data center industry is putting “unprecedented pressure” on ERCOT’s grid.

“While the state has added new generation and transmission capacity, lengthy interconnection timelines and grid-planning limitations mean that supply and transmission are not keeping pace with this rapid expansion,” Schurr says. “This impacts both reliability and affordability.”

For families in Texas, this could result in higher energy bills, he says. Meanwhile, critical facilities like hospitals and grocery stores face a heightened challenge of preventing power outages during extreme weather or at other times when the ERCOT grid is taxed.

“I expect this trend to continue as AI and high-density computing grow, driving higher peak demand and greater grid variability — made even more complex by more renewables, extreme weather and other large energy users, like manufacturers,” Schurr says.

According to the Pew Research Center, data centers accounted for 4 percent of U.S. electricity use in 2024, and power demand from data centers is expected to more than double by 2030. Data centers that support the AI boom make up much of the rising demand.

In September, RBN Energy reported more than 10 massive data-center campuses had been announced in Texas, with dozens more planned. The Lone Star State is already home to roughly 400 data centers.

“Texas easily ranks among the nation’s top states for existing data centers, with only Virginia edging it out in both data-center count and associated power demand,” says RBN Energy.

Houston-based CAMS will operate the Mesteño Wind Project, which is home to one of the tallest wind turbine installations in the U.S. Photo via Unsplash.

Houston company wins contract to operate South Texas wind farm

wind deal

Houston-based Consolidated Asset Management Services (CAMS), which provides services for owners of energy infrastructure, has added the owner of a South Texas wind power project to its customer list.

The new customer, InfraRed Capital Partners, owns the 202-megawatt Mesteño Wind Project in the Rio Grande Valley. InfraRed bought the wind farm from Charlotte, North Carolina-based power provider Duke Energy in 2024. CAMS will provide asset management, remote operations, maintenance, compliance and IT services for the Mesteño project.

Mesteño began generating power in 2019. The wind farm is connected to the electric grid operated by the Energy Reliability Council of Texas (ERCOT).

With the addition of Mesteño, CAMS now manages wind energy projects with generation capacity of more than 2,500 megawatts.

Mesteño features one of the tallest wind turbine installations in the U.S., with towers reaching 590.5 feet. Located near Rio Grande City, the project produces enough clean energy to power about 60,000 average homes.

In June, CAMS was named to the Financial Times’ list of the 300 fastest-growing companies in North and South America. The company’s revenue grew more than 70 percent from 2020 to 2023.

Earlier this year, CAMS jumped into the super-hot data center sector with the rollout of services designed to help deliver reliable, cost-effective power to energy-hungry data centers. The initiative focuses on supplying renewable energy and natural gas.
A rendering of a Last Energy nuclear reactor. Courtesy of Last Energy

Texas A&M's micro-nuclear reactor tops energy transition news to know

Trending News

Editor's note: The top energy transition news of November includes major energy initiatives from Texas universities and the creation of a new Carbon Measures coalition. Here are the most-read EnergyCapitalHTX stories from Nov. 1-15:

1. Micro-nuclear reactor to launch next year at Texas A&M innovation campus

Last Energy will build a 5-megawatt reactor at the Texas A&M-RELLIS campus. Photo courtesy Last Energy.

The Texas A&M University System and Last Energy plan to launch a micro-nuclear reactor pilot project next summer at the Texas A&M-RELLIS technology and innovation campus in Bryan. Washington, D.C.-based Last Energy will build a 5-megawatt reactor that’s a scaled-down version of its 20-megawatt reactor. The micro-reactor initially will aim to demonstrate safety and stability, and test the ability to generate electricity for the grid. Continue reading.

2. Baker Hughes to provide equipment for massive low-carbon ammonia plant

Baker Hughes will supply equipment for Blue Point Number One, a $4 billion low-carbon ammonia plant being developed in Louisiana. Photo courtesy Technip Energies.

Houston-based energy technology company Baker Hughes has been tapped to supply equipment for what will be the world’s largest low-carbon ammonia plant. French technology and engineering company Technip Energies will buy a steam turbine generator and compression equipment from Baker Hughes for Blue Point Number One, a $4 billion low-carbon ammonia plant being developed in Louisiana by a joint venture comprising CF Industries, JERA and Mitsui & Co. Technip was awarded a contract worth at least $1.1 billion to provide services for the Blue Point project. Continue reading.

3. Major Houston energy companies join new Carbon Measures coalition

The new Carbon Measures coalition will create a framework that eliminates double-counting of carbon pollution and attributes emissions to their sources. Photo via Getty Images.

Six companies with a large presence in the Houston area have joined a new coalition of companies pursuing a better way to track the carbon emissions of products they manufacture, purchase and finance. Houston-area members of the Carbon Measures coalition are Spring-based ExxonMobil; Air Liquide, whose U.S. headquarters is in Housto; Mitsubishi Heavy Industries, whose U.S. headquarters is in Houston; Honeywell, whose Performance Materials and Technologies business is based in Houston; BASF, whose global oilfield solutions business is based in Houston; and Linde, whose Linde Engineering Americas business is based in Houston. Continue reading.

4. Wind and solar supplied over a third of ERCOT power, report shows

A new report from the U.S. Energy Information Administration shows that wind and solar supplied more than 30 percent of ERCOT’s electricity in the first nine months of 2025. Photo via Unsplash.

Since 2023, wind and solar power have been the fastest-growing sources of electricity for the Electric Reliability Council of Texas (ERCOT) and increasingly are meeting stepped-up demand, according to a new report from the U.S. Energy Information Administration (EIA). The report says utility-scale solar generated 50 percent more electricity for ERCOT in the first nine months this year compared with the same period in 2024. Meanwhile, electricity generated by wind power rose 4 percent in the first nine months of this year versus the same period in 2024. Continue reading.

5. Rice University partners with Australian co. to boost mineral processing, battery innovation

Locksley Resources will provide antimony-rich feedstocks from a project in the Mojave Desert as part of a new partnership with Rice University that aims to develop scalable methods for extracting and utilizing antimony. Photo via locksleyresources.com.au.

Rice University and Australian mineral exploration company Locksley Resources have joined together in a research partnership to accelerate the development of antimony processing in the U.S. Antimony is a critical mineral used for defense systems, electronics and battery storage. Rice and Locksley will work together to develop scalable methods for extracting and utilizing antimony. Continue reading.

Data centers, EVs, and storms put the Texas grid to the test. Photo courtesy UH.

Houston expert asks: Is the Texas grid ready for the future?

Guets Column

Texas has spent the past five years racing to strengthen its electric grid after Winter Storm Uri exposed just how vulnerable it was. Billions have gone into new transmission lines, grid hardening, and a surge of renewables and batteries. Those moves have made a difference, we haven’t seen another systemwide blackout like Uri, but the question now isn’t what’s been done, it’s whether Texas can keep up with what’s coming.

Massive data centers, electric vehicles, and industrial projects are driving electricity demand to unprecedented levels. NERC recently boosted its 10-year load forecast for Texas by more than 60%. McKinsey projects that U.S. electricity demand will rise roughly 40% by 2030 and double by 2050, with data centers alone accounting for as much as 11-12% of total U.S. electricity demand by 2030, up from about 4% today. Texas, already the top destination for new data centers, will feel that surge at a greater scale.

While the challenges ahead are massive and there will undoubtedly be bumps in the road (some probably big), we have an engaged Texas legislature, capable regulatory bodies, active non-profits, pragmatic industry groups, and the best energy minds in the world working together to make a market-based system work. I am optimistic Texas will find a way.

Why Texas Faces a Unique Grid Challenge

About 90% of Texas is served by a single, independent grid operated by ERCOT, rather than being connected to the two large interstate grids that cover the rest of the country. This structure allows ERCOT to avoid federal oversight of its market design, although it still must comply with FERC reliability standards. The trade-off is limited access to power from neighboring states during emergencies, leaving Texas to rely almost entirely on in-state generation and reserves when extreme weather hits.

ERCOT’s market design is also different. It’s an “energy-only” market, meaning generators are paid for electricity sold, not for keeping capacity available. While that lowers prices in normal times, it also makes it harder to finance backup, dispatchable generation like natural gas and batteries needed when the wind isn’t blowing or the sun isn’t shining.

The Risks Mounting

In Texas, solar and wind power supply a significant percentage of electricity to the grid. As Julie Cohn, a nonresident scholar at the Baker Institute, explains, these inverter‑based resources “connect through power electronics, which means they don’t provide the same physical signals to the grid that traditional generators do.” The Odessa incidents, where solar farms tripped offline during minor grid disturbances, showed how fragile parts of this evolving grid can be. “Fortunately, it didn’t result in customer outages, and it was a clear signal that Texas has the opportunity to lead in solving this challenge.”

Extreme weather adds more pressure while the grid is trying to adapt to a surge in use. CES research manager Miaomiao Rimmer notes: “Hurricane frequencies haven't increased, but infrastructure and population in their paths have expanded dramatically. The same hurricane that hit 70 years ago would cause far more damage today because there’s simply more in harm’s way.”

Medlock: “Texas has made significant strides in the last 5 years, but there’s more work to be done.”

Ken Medlock, Senior Director of the Center for Energy Studies at Rice University’s Baker Institute, argues that Texas’s problem isn’t a lack of solutions; it’s how quickly those solutions are implemented. He stresses that during the January 2024 cold snap, natural gas kept the grid stable, proving that “any system configuration with sufficient, dispatchable generation capacity would have kept the lights on.” Yet ERCOT load has exceeded dispatchable capacity with growing frequency since 2018, raising the stakes for future reliability.

Ken notes: “ERCOT has a substantial portfolio of options, including investment in dispatchable generation, storage near industrial users, transmission expansion, and siting generation closer to load centers. But allowing structural risks to reliability that can be avoided at a reasonable cost is unacceptable. Appropriate market design and sufficient regulatory oversight are critical.” He emphasizes that reliability must be explicitly priced into ERCOT’s market so backup resources can be built and maintained profitably. These resources, whether natural gas, nuclear, or batteries, cannot remain afterthoughts if Texas wants a stable grid.

Building a More Reliable Grid

For Texas to keep pace with rising demand and withstand severe weather, it must act decisively on multiple fronts, strengthening its grid while building for long-term growth.

  • Coordinated Planning: Align regulators, utilities, and market players to plan decades ahead, not just for next summer.
  • Balancing Clean and Reliable Power: Match renewable growth with flexible, dispatchable generation that can deliver power on demand.
  • Fixing Local Weak Spots: Harden distribution networks, where most outages occur, rather than focusing only on large-scale generation.
  • Market Reform and Technology Investment: Price reliability fairly and support R&D to make renewables strengthen, not destabilize, the grid.

In Conclusion

While Texas has undeniably improved its grid since Winter Storm Uri, surging electricity demand and intensifying weather mean the work is far from over. Unlike other states, ERCOT can’t rely on its neighbors for backup power, and its market structure makes new dispatchable resources harder to build. Decisive leadership, investment, and reforms will be needed to ensure Texas can keep the lights on.

It probably won’t be a smooth journey, but my sense is that Texas will solve these problems and do something spectacular. It will deliver more power with fewer emissions, faster than skeptics believe, and surprise us all.

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Scott Nyquist is a senior advisor at McKinsey & Company and vice chairman, Houston Energy Transition Initiative of the Greater Houston Partnership. The views expressed herein are Nyquist's own and not those of McKinsey & Company or of the Greater Houston Partnership. This article originally appeared on LinkedIn.

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Houston giant's growing virtual power plant tops energy news to know

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Editor's note: NRG has made headlines to start off the new year, with plans to grow its virtual power plant network and announcing a new CEO. Plus, Greentown Labs introduces its newest startups, and we preview the top energy events of the quarter. Read on for the top Houston energy transition news published Jan. 1-15, 2026:

1. NRG makes latest partnership to grow virtual power plant

NRG Energy has partnered with Sunrun to grow its virtual power plant and support the ERCOT grid. Photo via Pexels.

Houston-based NRG Energy has announced a new long-term partnership with San Francisco-based Sunrun that aims to meet Texas’ surging energy demands and accelerate the adoption of home battery storage in Texas. The partnership also aligns with NRG’s goal of developing a 1-gigawatt virtual power plant by connecting thousands of decentralized energy sources by 2035. Continue reading.

2. Houston-based NRG announces new CEO and succession plan

Robert J. Gaudette will take over as NRG's new CEO on April 30. Photo via NRG.com.

Houston-based NRG Energy Inc. announced that it has appointed Robert J. Gaudette as president and CEO. Gaudette took over as president effective Jan. 7 and will assume the role of CEO April 30, coinciding with the company's next stockholder meeting. Gaudette, who previously served as executive vice president and president of NRG Business and Wholesale Operations, will succeed Lawrence Coben in the leadership roles. Continue reading.

3. Japanese company launches solar module manufacturing at Houston-area plant

TOYO Solar LLC has begun operations at its solar module manufacturing facility in Humble, Texas. Photo via Pexels.

A local subsidiary of a Japanese solar equipment manufacturer recently began producing solar modules at a new plant in Humble. TOYO Co. Ltd.’s TOYO Solar LLC subsidiary can produce 1 gigawatt worth of solar modules per year at a 567,140-square-foot plant it leases in Lovett Industrial’s Nexus North Logistics Park on Greens Road. TOYO Solar’s next phase will accommodate 2.5 gigawatts’ worth of solar module manufacturing. The subsidiary eventually plans to expand manufacturing capacity to 6.5 gigawatts. Continue reading.

4. 40+ climatetech startups join Greentown, including a dozen from Houston

Twelve local startups have joined Greentown Houston, along with others from around the world. Photo courtesy Greentown Labs.

More than 40 climatetech startups joined the Greentown Labs Houston community in the second half of 2025. Twelve hail from the Bayou City. The companies are among a group of nearly 70 that joined the climatetech incubator, which is co-located in Houston and Boston, in Q3 and Q4. Continue reading.

5. 10+ must-attend Houston energy events happening in Q1 2026

CERAWeek returns to close out March 2026 programming in Houston. Photo via CERAWeek.com

With the new year comes a new slate of must-attend events for those in the Houston energy sector. We've rounded up a host of events to put on your calendar for Q1, including some that you can attend this month. Plus, other premier annual events will return in February and March 2026 and are currently offering early-bird, discounted registration. Continue reading.

New UH white paper pushes for national plastics recycling policy

plastics paper

The latest white paper from the University of Houston’s Energy Transition Institute analyzes how the U.S. currently handles plastics recycling and advocates for a national, policy-driven approach.

Ramanan Krishnamoorti, vice president for energy and innovation at UH; Debalina Sengupta, assistant vice president and chief operating officer at the Energy Transition Institute; and UH researcher Aparajita Datta authored the paper titled “Extended Producer Responsibility (EPR) for Plastics Packaging: Gaps, Challenges and Opportunities for Policies in the United States.” In the paper, the scientists argue that the current mix of state laws and limited recycling infrastructure are holding back progress at the national level.

EPR policies assign responsibility for the end-of-life management of plastic packaging to producers or companies, instead of taxpayers, to incentivize better product design and reduce waste.

“My hope is this research will inform government agencies on what policies could be implemented that would improve how we approach repurposing plastics in the U.S.,” Krishnamoorti said in a news release. “Not only will this information identify policies that help reduce waste, but they could also prove to be a boon to the circular economy as they can identify economically beneficial pathways to recycle materials.”

The paper notes outdated recycling infrastructure and older technology as roadblocks.

Currently, only seven states have passed EPR laws for plastic packaging. Ten others are looking to pass similar measures, but each looks different, according to UH. Additionally, each state also has its own reporting system, which leads to incompatible datasets. Developing national EPR policies or consistent nationwide standards could lead to cleaner and more efficient processes, the report says.

The researchers also believe that investing in sorting, processing facilities, workforce training and artificial intelligence could alleviate issues for businesses—and particularly small businesses, which often lack the resources to manage complex reporting systems. Digital infrastructure techniques and moving away from manual data collection could also help.

Public education on recycling would also be “imperative” to the success of new policies, the report adds.

“Experts repeatedly underscored that public education and awareness about EPR, including among policymakers, are dismal,” the report reads. “Infrastructural limitations, barriers to access and the prevailing belief that curbside recycling is ineffective in the U.S. contribute to public dissatisfaction, misinformation and, in some cases, opposition toward the use of taxpayers’ and ratepayers’ contributions for EPR.”

For more information, read the full paper here.

Investment bank opens energy-focused office in Houston

new to hou

Investment bank Cohen & Co. Capital Markets has opened a Houston office to serve as the hub of its energy advisory business and has tapped investment banking veteran Rahul Jasuja as the office’s leader.

Jasuja joined Cohen & Co. Capital Markets, a subsidiary of financial services company Cohen & Co., as managing director, and head of energy and energy transition investment banking. Cohen’s capital markets arm closed $44 billion worth of deals last year.

Jasuja previously worked at energy-focused Houston investment bank Mast Capital Advisors, where he was managing director of investment banking. Before Mast Capital, Jasuja was director of energy investment banking in the Houston office of Wells Fargo Securities.

“Meeting rising [energy] demand will require disciplined capital allocation across traditional energy, sustainable fuels, and firm, dispatchable solutions such as nuclear and geothermal,” Jasuja said in a news release. “Houston remains the center of gravity where capital, operating expertise, and execution come together to make that transition investable.”

The Houston office will focus on four energy verticals:

  • Energy systems such as nuclear and geothermal
  • Energy supply chains
  • Energy-transition fuel and technology
  • Traditional energy
“We are making a committed investment in Houston because we believe the infrastructure powering AI, defense, and energy transition — from nuclear to rare-earth technology — represents the next secular cycle of value creation,” Jerry Serowik, head of Cohen & Co. Capital Markets, added in the release.
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