Resource Adequacy

    ERCOT counts on an adequate supply of electric generation to meet demand and maintain capacity reserves to help support grid reliability if shortfalls occur.

    This section includes access to ERCOT market studies and analysis materials related to resource adequacy as well as ERCOT short- and long-term forecast reports on generation supply and demand.

    Reports produced prior to 2012 are located in the yearly archive section of Reports and Presentations

    All other archives are located at the bottom of the page.

    Drought Risk

    ERCOT developed a drought risk monitoring tool to screen for potential drought-related impacts to generation resources. The tool predicts whether water supplies used by generation resources in the ERCOT region are at risk of reaching levels requiring closer monitoring over the next 6 to 18 months, based on the most recent reservoir and lake levels from the Texas Water Development Board (TWDB) and historical trends in water usage. The documents available in this section include summaries of the results of this analysis, documentation of the tool methodology, and other related reports.

    Drought Risk Analysis Reports
    Related Documents

    Generator Interconnection Status Report

    View the latest public interconnection information on generation resources in the ERCOT region.

    • GIS REPORT October 2018
      Generation Interconnection activity for October
      (Nov 01, 2018 – xlsx – 113.3 KB)
    • GIS REPORT September 2018
      Generation Interconnection activity for September
      (Oct 01, 2018 – xlsx – 110.4 KB)
    • GIS REPORT August 2018
      Generator interconnection activity for August, using the new report format. Updated to include corrected charts on the GINR Trend tab.
      (Sep 18, 2018 – xlsx – 114.5 KB)
    • GIS REPORT July 2018
      Generator interconnection activity for July
      (Aug 01, 2018 – xlsx – 1.3 MB)
    • GIS REPORT June 2018
      Generator interconnection activity for June
      (Jul 03, 2018 – xlsx – 1.3 MB)
    • GIS REPORT May 2018 Update
      Resource with project name "FEGC" reported as approved for synchronization
      (Jun 06, 2018 – xlsx – 1.4 MB)
    • GIS REPORT May 2018
      Generator interconnection activity for May. ***New Quarterly Stability Assessment (QSA) tab added***
      (Jun 01, 2018 – xlsx – 1.4 MB)
    • GIS REPORT April 2018
      Generator interconnection activity for April
      (May 02, 2018 – xlsx – 1.4 MB)
    • GIS REPORT March 2018
      Generator interconnection activity for March
      (Apr 02, 2018 – xlsx – 1.4 MB)
    • GIS REPORT February 2018
      Generator interconnection activity for February
      (Mar 01, 2018 – xlsx – 1.4 MB)
    • GIS REPORT January 2018
      Generator interconnection activity for January 2018
      (Feb 02, 2018 – xlsx – 1.4 MB)
    • GIS REPORT December 2017
      Generator interconnection activity for December 2017
      (Jan 03, 2018 – xlsx – 1.4 MB)

    Resource Capacity Trend Charts

    Files with charts and accompanying data showing annual changes in resource capacity by fuel type for the ERCOT Region, incorporating both historical additions and planned projects being studied as part of the interconnection request process. The chart files are updated on a monthly basis.

    Resource Adequacy Assessments

    Seasonal Assessment of Resource Adequacy

    The SARA is based on criteria similar to CDR, however the seasonal outlook reflects near-term weather forecasts, generator outage trends, and updates to the generation fleet. 

    Capacity, Demand and Reserves Report

    This biannual report contains a 10-year forecast of electric use and expected generation resources.

    Planning Reserve Margin Analysis

    This section consists of documents and data files pertaining to the Economically Optimum Reserve Margin (EORM) reporting initiative, which was authorized by the Public Utility Commission of Texas as part of Project Number 42302, "Review of the Reliability Standard in the ERCOT Region." The current minimum target reserve margin established by the ERCOT Board of Directors is 13.75 percent of peak electricity demand to serve electric needs in the case of unexpectedly high demand or levels of generation plant outages.

    Wind and Solar

    Wind and solar profiles for use in ERCOT planning studies, as well as files showing the derivation of wind and solar peak average capacity percentages using approved CDR methodologies.