What ERCOT’s 91.1 GW Record Establishes
The U.S. Energy Information Administration reports that ERCOT’s hourly electricity demand reached 91.1 gigawatts at 6:00 p.m. Central Time on July 22. The event occurred during a Texas heat wave and exceeded the previous hourly record of 85.5 GW, set on August 10, 2023, by 6%.
EIA’s hourly grid data also provides useful supply context. Natural gas accounted for 48% of generation during the record hour, while solar supplied 32%. That mix shows how thermal generation and a large daytime solar contribution supported the system at the measured peak. It does not establish the contribution of any one generator, battery, contract, or customer curtailment action.
What The Weekly Average Record Adds
EIA reports that hourly ERCOT load averaged a record 74.5 GW for the week ending August 22. The following week averaged 73.7 GW, which KilowattLogic calculates was only 1.1% lower. The six weeks from the week ending July 25 through August 29 all exceeded the prior 70.0 GW weekly average record set in 2023.
The weekly measure adds persistence to the hourly record. EIA says the 74.5 GW average was 10% above the highest weekly average in summer 2025 and 6% above the previous record. Those are system-load comparisons, not price, outage, or customer-bill findings.
Why The Record Does Not Equal A Retail Price Forecast
System demand is one input to wholesale and retail electricity economics, but the 91.1 GW observation does not by itself determine a commercial customer’s delivered price. Customer outcomes still depend on contract structure, settlement interval, load shape, congestion zone, utility tariff, transmission allocation, supplier treatment, and any pass-through provisions.
- It is a reported operating fact: the record identifies the highest ERCOT hourly demand in EIA’s published series.
- It is not a supplier quote: no fixed-price premium, real-time settlement amount, or customer savings value follows automatically from the system peak.
- It is not a 4CP result: ERCOT’s transmission-allocation process uses specific 15-minute coincident-peak intervals and customer demand, not the EIA hourly observation alone.
- It is not a reliability-failure finding: record demand and heat are material operating context, but this source does not report a load-shed event or customer outage caused by the record.
Commercial Buyer Checklist After A New Peak
- Reconcile interval data: review facility demand around July 22 at 6:00 p.m. CT and compare it with operating schedules, weather sensitivity, and any curtailment record.
- Check transmission exposure: use the ERCOT 4CP guide to confirm how the account’s utility and supplier treat coincident-peak demand before assigning a bill impact.
- Review contract mechanics: separate fixed-energy pricing from real-time index exposure, congestion or loss adders, utility delivery charges, and demand-related provisions.
- Test operational readiness: verify who receives a peak alert, which loads may be reduced, the minimum notice required, and which production or comfort constraints prevent curtailment.
- Keep source states separate: distinguish measured ERCOT demand from queue forecasts, proposed large-load projects, future generation additions, and retail-rate claims.
What To Watch After The Summer Records
Buyers should monitor current ERCOT demand, reserve notices, and settlement data alongside facility interval data, but avoid assuming that every high-load hour becomes a coincident peak or a price event for every contract. The ERCOT reserve-methodology owner tracks the separate operating-notice evidence.
Large-load growth remains an important planning thread in Texas. The ERCOT market and data-center path tracks queue, reliability, congestion, and policy developments while separating proposed or forecast load from projects that are actually energized. Facilities evaluating flexible-load programs can also use the demand response guide to frame operational questions before discussing program eligibility or economics.
Source trail: EIA Today in Energy, September 3 and August 3, 2026; EIA-930 Hourly Electric Grid Monitor; and ERCOT’s historical peak-demand archive. Retrieved September 4, 2026.