Solar power in Texas is quietly crossing a threshold that would have seemed impossible a decade ago, and the exact timing of that crossing has sparked a genuine dispute between two of the most authoritative energy data sources in the country.
Story Snapshot
- The U.S. Energy Information Administration forecasts solar generation in Texas will produce 78 billion kilowatt-hours in 2026, surpassing coal’s projected 60 billion kilowatt-hours for the first time on an annual basis.
- ERCOT, the grid operator covering most of Texas, says the crossover already happened in 2025, creating a significant and unresolved conflict with the federal forecast.
- Solar already beat coal in Texas on a monthly basis in March 2025, a milestone both sides agree on, making the annual debate a question of when, not whether.
- Texas is expected to account for roughly 40 percent of all new U.S. solar capacity additions in 2026, cementing its role as the nation’s dominant solar growth engine.
A Milestone That Depends on Who Is Counting
The U.S. Energy Information Administration (EIA) published its Short-Term Energy Outlook projecting that solar installations inside the Electric Reliability Council of Texas (ERCOT) grid will generate 78 billion kilowatt-hours in 2026, compared to 60 billion kilowatt-hours from coal. That is a 30 percent gap, not a squeaker. The EIA frames 2026 as the first year solar crosses coal on an annual basis inside ERCOT, the grid that covers the vast majority of Texas power consumers. [2]
ERCOT disagrees. Spokesperson Trudi Webster told E&E News that ERCOT’s own fuel-mix reports confirm solar surpassed coal on an annual basis in 2025, a full year ahead of the EIA projection. The gap between these two institutional readings is not a rounding error. E&E News described the discrepancy between EIA and ERCOT solar generation figures as more than 10 terawatt-hours, which is enormous relative to the margin separating the two fuels. [3] Neither agency has publicly explained the methodology difference that produces such a wide divergence.
The March 2025 Monthly Crossover Both Sides Agree On
Strip away the annual dispute and one fact is not in contention. Solar generation in ERCOT exceeded coal on a monthly basis for the first time in March 2025, when solar produced 4.33 billion kilowatt-hours against coal’s 4.16 billion kilowatt-hours. [2] That monthly result is the clearest confirmed data point in the entire story, and it matters because it establishes the physical reality of the transition regardless of which annual accounting method you prefer. The direction of travel is not in dispute. The scorekeeping is.
First-quarter 2026 data adds more texture. ERCOT recorded 14.0 billion kilowatt-hours of solar generation in the first three months of 2026, slightly ahead of coal’s 13.8 billion kilowatt-hours for the same period. [4] That quarterly result aligns with the EIA’s forecast trajectory and suggests the annual crossover, whether it first happened in 2025 or is happening now in 2026, is not a temporary blip driven by a single warm month. It is a structural shift in the Texas generation mix.
Texas Is Driving the Entire U.S. Solar Expansion
The EIA expects approximately 40 percent of all new U.S. solar capacity additions in 2026 to occur in Texas, translating to roughly 14 billion kilowatt-hours of new generation. [2] That concentration is striking. Texas is not just participating in the national solar buildout; it is leading it by a wide margin. The state’s flat terrain, high solar irradiance, deregulated electricity market, and available land have made it the preferred destination for utility-scale solar developers across the country.
PV power generation to surpass coal in Texas: Utility-scale solar power is projected to surpass coal-fired generation in the ERCOT grid this year as massive capacity additions continue to reshape the state… https://t.co/grQbJJX8V8 #Photovoltaics #EnergyStorage #RenewableEnergy pic.twitter.com/0O52C2Eld8
— pv magazine (@pvmagazine) May 16, 2026
Natural gas remains the dominant fuel in ERCOT by a substantial margin, and that is unlikely to change in the near term. The solar-versus-coal story is real and significant, but it should not be mistaken for a wholesale transformation of Texas power supply. What it does represent is the accelerating displacement of the most carbon-intensive generation source on the grid by one of the fastest-growing. For Texas ratepayers, more solar competing with coal on price and volume is straightforwardly good news, regardless of which year the history books eventually assign to the annual crossover.
Why the EIA and ERCOT Disagreement Actually Matters
The interagency gap is not just a technical footnote. When two credible institutions report figures that differ by more than 10 terawatt-hours on the same question, it signals that someone is using different metering boundaries, different resource classifications, or different accounting rules. [3] Until that methodology gap is publicly reconciled, every headline claiming a precise milestone year carries an asterisk. The EIA is working from a forecast model; ERCOT is the entity that actually operates the grid and reads the meters. That institutional difference matters when the two accounts conflict, and common sense suggests ERCOT’s observed data deserves serious weight alongside the federal projection.
What both sides agree on is the direction. Solar is growing fast in Texas, coal is shrinking, and the crossover is either already in the rearview mirror or arriving this year. For a state that once built its energy identity almost entirely around fossil fuels, that is a remarkable sentence to be writing in 2026.
Sources:
[2] Web – Electricity generation from solar could exceed coal in ERCOT … – EIA
[3] Web – Texas grid operator says it hit EIA’s solar milestone last year
[4] Web – Billions Worth of Texas Solar Power Projects to Come Online in 2026
