Generation
EIA-923 through Jul 2026The same ERCOT plants made 3.6% more power than a year earlier. Solar added 7.8 TWh and nuclear fell 1.6 TWh. Clean power is 42% of its output, up 12 points since 2019.
How ERCOT got here
Share of net generation each yearClean power 30% in 2019, 42% in 2025. Hover a year for its mix.
Fuel by fuel
Share is 2025; Jan–Jul compares the same plantsWho makes ERCOT’s power
2025, 518 TWhEach block is a plant. Hover to see it, click to open its page.
Each block is one plant, sized by its 2025 output; the lighter block holds the smaller plants. Pumped storage, which nets negative, is left out.
This year against last
20262025Running total, same plants, each on its own scaleBiggest gains
Martin Lake+1.5 TWh4.6 TWh → 6.1Cedar Bayou+1.2 TWh383 GWh → 1.6Tenaska Frontier Generati…+1.2 TWh1.3 TWh → 2.5Oak Grove (TX)+840 GWh6.0 TWh → 6.9Biggest drops
Jack County−2.4 TWh3.9 TWh → 1.4South Texas Project−1.5 TWh13.4 TWh → 11.9W A Parish−1.5 TWh8.5 TWh → 7.0Limestone−818 GWh4.5 TWh → 3.7New this year
31 plants, 7.8 GW, made 8.6 TWh by July.
Battery discharge
GWh a month2026 months are provisional: monthly reporters only. Plants that report once a year appear when the 2026 file is final.
CO₂ intensity
lb per MWh682 lb/MWh in 2025, down 15% since 2020. The seven ISOs together: 767.
EIA-923: 2019–2025 final; Jan–Jul 2026 counts plants that report monthly (about 88% of ERCOT’s output last year) and compares them with the same plants in 2025. CO₂ from 2020: EPA CAMPD, or EIA-923 fuel use × EPA emission factors where CAMPD misses a plant or covers it in part. Sources