NOTICE DATE: November 5, 2025

NOTICE TYPE: M-C110525-01 Settlements

SHORT DESCRIPTION: RTC+B: Implementation Details of Settlement-Related NPRRs

INTENDED AUDIENCE: All Market Participants

DAYS AFFECTED: December 5, 2025

LONG DESCRIPTION: On December 5, 2025, Settlement-related Protocol language associated with the following Nodal Protocol Revision Requests (NPRRs) will be implemented:

• 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
• NPRR1012, RTC - NP 9: Settlement and Billing
• 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)
• NPRR1058, Resource Offer Modernization (Section 6.6.9)
• NPRR1172, Fuel Adder Definition, Mitigated Offer Caps, and RUC Clawback (Section 5.7.2)
• 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
• NPRR1290, Gap Resolutions and Clarifications for the Implementation of RTC+B (Phase 1)

The following Settlement-related changes will be made to the Protocol sections listed below and implemented on December 5, 2025:

• 3.9.1, Current Operating Plan (COP) Criteria: Removed ONREG, ONOSREG, ONDSRREG, FRRSUP, ONRR, ONECRS, ONFFRRRS, and OFFNS Resource Statuses for Generation Resources. Added ONSC and ONHOLD Resource Statuses for Generation Resources. Removal of ONRGL, FRRSUP, FRRSDN, ONCLR, ONRL, ONECL, and ONFFRRRSL Resource Statuses for Load Resources. Added ONL Resource Status for Load Resources.
• 4.4.9.3.3, Energy Offer Curve Caps:
  • Modified Day-Ahead Energy Offer Curve Price Cap (DAEOCPRCAP) calculation to use the minimum of the Day-Ahead System-Wide Offer Cap (DASWCAP) and the Price Cap based on the Resource Type;
  • removed RMR category; and
  • modified Real-Time Energy Offer Curve Cost Cap to use Real-Time System-Wide Offer Cap (RTSWCAP) in place of SWCAP and use of Value of Lost Load (VOLL) for RMR Resources.
• 4.6.2.3, Day-Ahead Make-Whole Settlements: Excluded Energy Storage Resources (ESR) from Day-Ahead Make-Whole Payments.
• 4.6.4.1, Payments for Ancillary Services Procured in the DAM: Added new payment for Day-Ahead Ancillary Service- Only Awards for each Ancillary Service type.
• 4.6.4.2, Charges for Ancillary Services Procurement in the DAM: Included the amounts related to the Day-Ahead Ancillary Service- Only Awards in the total cost of the Ancillary Service for each Ancillary Service type.
• 5.7.1, RUC Make-Whole Payment: Excluded ESRs from RUC Make-Whole Payments (RUCMWAMT).
• 5.7.1.3, Revenue Less Cost Above LSL During RUC-Committed Hours: Modified Revenue Less Cost Above LSL During RUC-Committed Hours (RUCEXRR) calculation with addition of Real-Time Ancillary Service Revenue (RTASREV) calculation.
• 5.7.1.4, Revenue Less Cost During QSE Clawback Intervals: Modified Energy Revenue Less Cost During QSE-Clawback Intervals (RUCEXRQC) calculation with addition of RTASREV calculation.
• 5.7.2, RUC Clawback Charge:
  • Excluded ESRs from RUC Clawback Charge (RUCCBAMT); and
  • removed RUCCBFR Factor and RUCCBFC Factor calculations. Modified RUC Clawback Charge (RUCCBAMT) to remove RUCCBFR Factor and RUCCBFC Factor from the calculation, making the calculation claw-back 100% of excess revenue.
• 5.7.3, Payment When ERCOT Decommits a QSE-Committed Resource: Excluded ESRs from RUC Decommitment Payment (RUCDCAMT).
• 5.7.4.1.1, Capacity Shortfall Ratio Share:
  • Replaced existing HASL processes with new methods of measuring Resource Capacity (RCAPSNAP/ADJ);
  • created RUC Overall Shortfall (RUCOSFSNAP/ADJ) calculations, Ancillary Service On-Line Position (ASONPOSSNAP/ADJ) calculations, and RUC Ancillary Service Shortfall (RUCASFSNAP/ADJ) calculations;
  • modified RUC Capacity (RUCCAPSNAP/ADJ) calculations and RUC Shortfall (RUCSFSNAP/ADJ) calculations; and
  • updated Resource Capacity (RCAPSNAP/ADJ) calculations for IRRs to use the lesser of the WGRPP or PVGRPP and the HSL value as reflected in the QSE's COP at the time of the RUC execution.
• 6.6.3.7, Real-Time High Dispatch Limit Override Energy Payment:
  • Modified the High Dispatch Limit Override Energy Amount (HDLOEAMT) calculation to remove Real-Time Reserve Price for On-Line Resources (RTRSVPOR); and
  • changed Average High Ancillary Service Limit (AVGHASL) to Average High Sustained Limit (AVGHSL).
• 6.6.5, Set Point Deviation Charge:
  • Renamed to Set Point Deviation from Base Point Deviation throughout the entire section; and
  • replaced Adjusted Aggregated Base Point (AABP) with Average Aggregated Set Point (AASP).
• 6.6.5.5, Energy Storage Resource Set Point Deviation Charge for Over Performance: Added a new over performance evaluation for Energy Storage Resources.
• 6.6.5.5.1, Energy Storage Resource Set Point Deviation Charge for Under Performance: Added a new under performance evaluation for Energy Storage Resources.
• 6.6.5.6, Resources Exempt from Deviation Charges:
  • Rearranged the exemptions from the Set Point Deviation Section to have a singular location and separated by exemption and Resource type; and
  • removed language referencing exemptions for Dynamically Scheduled Resources.
• 6.6.7.1, Voltage Support Service Payments: Included ESRs in Voltage Support Service calculations.
• 6.6.9, Emergency Operations Settlement:
  • Included specification of which Emergency Energy calculation under Section 6.6.9.1 each Emergency Condition will utilize for compensation;
  • introduces a new, temporary dispute-based scenario in which QSEs can qualify for Emergency Operations Settlement; and
  • Energy Offer Curve or Energy Bid/Offer Curve used in the calculation of the Emergency Base Point Price (EBPPR) will be the curve that was submitted and approved immediately prior to the emergency event, excluding price correction events.
• 6.6.9.1, Payment for Emergency Operations Settlement:
  • Introduced alternate Emergency Energy amount calculation (paragraph 2) that considers net revenues received in Real-Time Energy and Real-Time Ancillary Services; and
  • Introduced calculations for charging load for ESRs.
• 6.7.4, Real-Time Settlement for Updated Day-Ahead Market Ancillary Service Obligations: Removed all existing Real-Time Ancillary Service calculations. Introduced of new calculations for Real-Time Settlement for Updated DAM Ancillary Service Obligations for each Ancillary Service Type.
• 6.7.5, Real-Time Ancillary Service Charges and Payments:
  • Eliminated existing Real-Time Ancillary Service Imbalance calculations;
  • introduced a new Ancillary Service Imbalance Settlement;
  • introduced a new charge for Ancillary Service- Only Offers awarded in the DAM;
  • introduced a new charge for any Ancillary Service trade overage;
  • introduced a new dispute-based payment for Real-Time Derated Ancillary Service Amount (RTDASAMT); and
  • introduced a new charge for Load- Allocated Real-Time Derated Ancillary Service Amount (LARTDASAMT).
• 6.7.6, Real-Time Ancillary Service Revenue Neutrality Allocation: Replaced the existing Load-Allocated Real-Time Ancillary Service Imbalance Revenue Neutrality calculations with Load-Allocated Real-Time Reg-Up Amount (LARTRUAMT) calculation, Load-Allocated Real-Time Reg-Down Amount (LARTRDAMT) calculation, Load-Allocated Real-Time Responsive Reserve Amount (LARTRRAMT) calculation, Load-Allocated Real-Time Non-Spin Amount (LARTNSAMT) calculation, and Load-Allocated Real-Time ERCOT Contingency Reserve Service Amount (LARTECRAMT) calculation.
• 7.9.1.3, Minimum and Maximum Resource Prices: Added ESR as a Resource Type in Minimum Resource Price (MINRESRPR) calculation and Maximum Resource Price (MAXRESRPR) calculation.
• 9.19.1, Default Uplift Invoices: Added Uplift Day-Ahead Ancillary Service- Only Award (UDAASOAWD) calculation.
• 9.19.3, Default Uplift Supporting Data Reporting: Default Uplift Supporting Data (EMIL ID: NP4-194-M, Report Type ID: 19306) will include the following new column:
  • Uplift Day-Ahead Ancillary Service- Only Award (UDAASOAWD)
• 25.5.2, Market Suspension Make-Whole Payment: Included ESRs in Market Suspension Make-Whole Payment (MSMWAMT) calculation.
• 25.5.5, Market Suspension Charge Allocation: Excluded ESRs in Load Allocated Real-Time Market Suspension Charge (LARTMSAMT) calculation.
• 25.5.6, Market Suspension Data Submissions: Included ESRs in Market Suspension Data Submissions.

Please see the attached document to view the new and stopped Settlement billing determinants.

ACTION REQUIRED: Impacted Market Participants should implement changes to their shadow Settlement systems to incorporate the Protocol revisions made by NPRR963, NPRR1000, NPRR1007, NPRR1008, NPRR1009, NPRR1010, NPRR1012, NPRR1014, NPRR1029, NPRR1058, NPRR1172, NPRR1216, NPRR1236, NPRR1245, NPRR1246, and NPRR1290.

ADDITIONAL INFORMATION: Pursuant to Nodal Protocol Section 21.6, Nodal Protocol Revision Implementation, ERCOT is required to provide notice as soon as practicable but no later than ten days prior to implementation.

NPRR963, NPRR1000, NPRR1007, NPRR1008, NPRR1009, NPRR1010, NPRR1012, NPRR1014, NPRR1029, NPRR1058, NPRR1172, NPRR1216, NPRR1236, NPRR1245, NPRR1246, and NPRR1290 and their associated documents can be found on the NPRR page of the ERCOT website.

Additional Settlement details can be found in the Settlements Charge Matrix located on the Settlements Information page on the Market Information System (MIS) Public Area.

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.

If you are receiving email from a public ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.

dg