NOTICE DATE:  November 21, 2025

NOTICE TYPE: M-E110525-02 Market Rules

SHORT DESCRIPTION:  RTC+B: Implementation Details of Revision Requests

INTENDED AUDIENCE:  All Market Participants

DAYS AFFECTED:  December 5, 2025

LONG DESCRIPTION:  On December 5, 2025, language associated with the following Revision Requests will be implemented for the Real-Time Co-optimization Plus Batteries (RTC+B) project. Unless otherwise noted, the Revision Request language will be fully implemented:

• NOGRR211, RTC - NOG 2 and 9: System Operations and Control Requirements and Monitoring Programs
• NOGRR221, Alignment Changes for January 1, 2021 Nodal Operating Guide - NPRRs 1010 and 1039
• NOGRR268, Related to NPRR1246, Energy Storage Resource Terminology Alignment for the Single-Model Era
• NOGRR276, Alignment Changes for June 1, 2025 Nodal Operating Guide - NPRR1246 and NPRR1270
• NOGRR277, Related to NPRR1282, Ancillary Service Duration under Real-Time Co-Optimization
• NOGRR278, Related to NPRR1290, Gap Resolutions and Clarifications for the Implementation of RTC+B
• NPRR963, Base Point Deviation Settlement and Deployment Performance Metrics for Energy Storage Resources (Combo Model)
  • Sections 6.6.5.5, 6.6.5.5.1, and 6.6.5.6
• NPRR1000, Elimination of Dynamically Scheduled Resources
• NPRR1007, RTC - NP 3: Management Activities for the ERCOT System
• NPRR1008, RTC - NP 4: Day-Ahead Operations
• NPRR1009, RTC - NP 5: Transmission Security Analysis and Reliability Unit Commitment
• NPRR1010, RTC - NP 6: Adjustment Period and Real-Time Operations
• NPRR1011, RTC - NP 8: Performance Monitoring
• NPRR1012, RTC - NP 9: Settlement and Billing
• NPRR1013, RTC - NP 1, 2, 16, and 25: Overview, Definitions and Acronyms, Registration and Qualification of Market Participants, and Market Suspension and Restart
• NPRR1014, BESTF-4 Energy Storage Resource Single Model
• NPRR1029, BESTF-6 DC-Coupled Resources
  • Sections 25.5.2, 25.5.5, and 25.5.6
• NPRR1046, Additional Revisions to Remove Dynamically Scheduled Resource (DSR) from the Protocols
• NPRR1075, Update Telemetered HSL and/or MPC for ESRs in Real-Time to Meet Ancillary Service Resource Responsibility
• NPRR1172, Fuel Adder Definition, Mitigated Offer Caps, and RUC Clawback
  • Section 5.7.2
• NPRR1204, Considerations of State of Charge with Real-Time Co-Optimization Implementation
• NPRR1216, Implementation of Emergency Pricing Program
  • Phase 1
• NPRR1236, RTC+B Modifications to RUC Capacity Short Calculations
• NPRR1245, Additional Clarifying Revisions to Real-Time Co-Optimization
• NPRR1246, Energy Storage Resource Terminology Alignment for the Single-Model Era
• NPRR1268, RTC - Modification of Ancillary Service Demand Curves 
• NPRR1269, RTC+B Three Parameters Policy Issues
• NPRR1270, Additional Revisions Required for Implementation of RTC
• NPRR1282, Ancillary Service Duration under Real-Time Co-Optimization
• NPRR1290, Gap Resolutions and Clarifications for the Implementation of RTC+B
  • Phase 1
• OBDRR020, RTC - Methodology for Setting Maximum Shadow Prices for Network and Power Balance Constraints
• OBDRR052, Related to NPRR1246, Energy Storage Resource Terminology Alignment for the Single-Model Era
• PGRR118, Related to NPRR1246, Energy Storage Resource Terminology Alignment for the Single-Model Era
• VCMRR044, RTC+B - Mitigated Offer Cap for Hydro Generation Resources

ADDITIONAL INFORMATION: Pursuant to Protocol Section 21.6, Nodal Protocol Revision Implementation, Nodal Operating Guide Section 1.3.5, Nodal Operating Guide Revision Implementation, Planning Guide Section 1.2.5, Planning Guide Revision Implementation, and Verifiable Cost Manual Section 13.6, Verifiable Cost Manual Revision Implementation, ERCOT is required to provide notice as soon as practicable but no later than ten days prior to implementation.  

Please review the ERCOT website for previous Market Notices related to this subject.

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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