Market Alerts
TX – M-B012126-01 Planned System Maintenance with Impacted Services
Notice Date: January 21, 2026
Notice Type: M-B012126-01 Retail/Wholesale
Short Description: Planned system maintenance with impacted services
Intended Audience: All Market Participants
Days Affected: January 22, 2026 18:30 – 19:30
Long Description: ERCOT will be performing planned system maintenance of Energy and Market Management systems (EMS, MMS, ITRON and EIN) applications and databases on January 22, 2026, during a maintenance window of 18:25 – 18:55.
During the maintenance window on January 22, 2026, Market Participants will experience an outage on the following services from 18:25 until 18:55.
- Market Management System (MMS) – Security-Constrained Economic Dispatch (SCED)/Look- Ahead SCED applications may be unavailable for 3 SCED intervals during the 18:25 to 18:55 timeframe
- Base Points from SCED may not be created for 3 SCED intervals during the 18:25 to 18:55 timeframe. During this period, Qualified Scheduling Entities (QSEs) with Resources may be required to follow Emergency Base Points from ERCOT Load Frequency Control
- Market submissions and requests via Web Services, Market Manager and Outage Scheduler
- Current Day Report (CDR) publishing and downloading which may cause the following reports to be unavailable
- SCED and Real-Time Dispatch (RTD) Reports
- NSA Active and Inactive Constraint Reports
- State Estimator Reports
- Real-Time Dynamic Rating Data Reports
- Wind Power Production – 5 minute Averaged Actual values
- Solar Power Production – 5 minute Averaged Actual values
- SOL Exceedance Report
- The Public Dashboards and ERCOT.com price displays will not be populated.
Note: Start and completion times of this maintenance may be delayed depending on system conditions at that time. A Hotline call to Market Participants will be executed prior to and following completion of the maintenance.
Contact: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at ClientServices@ercot.com.
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