Figure

ERCOT hourly generation by fuel across July 2026, storage included

Across all 744 hours of July 2026 the ERCOT battery fleet discharged 706 GWh and charged 900 GWh; July 22 was its largest discharge day at 29.8 GWh.

Stacked area chart of ERCOT hourly generation by fuel across all 744 hours of July 2026, storage included. Solar arcs by day and the storage band discharges into each evening, with the July 20 to 25 record window shaded. Over the month the battery fleet discharged 706 GWh and charged 900 GWh, and July 22 was its largest discharge day at 29.8 GWh against a 22.8 GWh daily average. The series is EIA-930 hourly net generation, a separate instrument from the ESR Integration Report figure of 12,017 MW, so the values differ.

This figure is from the ERCOT July 2026 heat-wave case study, a primary-source reconstruction of an all-time demand record crossed on a week without record heat, and what the public record does and does not show about it.

Cite this figure

Corey Balgeman, "ERCOT hourly generation by fuel across July 2026, storage included," Grid Flexibility, 2026. https://gridflexibility.fyi/case-studies/ercot-heat-wave-july-2026/figures/ercot-fuel-mix-wider-window

Licensed CC BY 4.0: free to republish with attribution. License details.

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Last updated: 2026-08-05.