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NOTICE DATE:  December 19, 2018

NOTICE TYPE:  W-A121918-01 Operations

SHORT DESCRIPTION:  2019 Minimum Monthly Ancillary Service Requirements

INTENDED AUDIENCE:  Qualified Scheduling Entities, Resource Entities, and Load Serving Entities

DAY AFFECTED:  January 1, 2019

LONG DESCRIPTION:  ERCOT Protocol Section 3.16 requires ERCOT to annually determine the methodology for determining the quantity requirements for each Ancillary Service needed for reliability, the methodology of which must be reviewed and approved by the ERCOT Board of Directors (Board). On December 11, 2018, the ERCOT Board of Directors approved the 2019 ERCOT Methodologies for Determining Ancillary Service Requirements (2019 AS Methodology). The approved changes affect the methodology for determining Non-Spinning Reserve Service. The 2019 AS Methodology will become effective on January 1, 2019. Please see ERCOT's December 11, 2018 presentation<http://www.ercot.com/content/wcm/key_documents_lists/137978/9_2019_Methodology_for_Determining_Minimum_Ancillary_Service_Requirements.pdf> to the ERCOT Board for additional details regarding these changes.



Per the 2019 AS Methodology, the minimum monthly Ancillary Service quantities have been posted in the Ancillary Service Requirement Methodology<https://mis.ercot.com/misapp/GetReports.do?reportTypeId=13036&mimic_duns=183529049> (EMIL ID NP3-783-M, Report ID 13036) on ERCOT's Market Information System (MIS). The posted quantities only reflect minimum requirements. ERCOT will provide the market with follow-up notice if any upward adjustments to these minimum quantities are made.

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 [log in to unmask]<mailto:[log in to unmask]>.

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