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ERCOT CDR Indicates 50% Reserve Margins; Summer Still Healthy 3 Years Out When New Load Considered

Winter Healthy Under New Contracted Loads, Challenged By 2027-28 Winter If Non-Contracted Load Considered


May 24, 2024

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Copyright 2024 EnergyChoiceMatters.com
Reporting by Paul Ring • ring@energychoicematters.com

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ERCOT has posted its May 2024 CDR

In addition to providing reserve margins under its standard load forecast, ERCOT also listed reserve margins under load forecasts that include prospective customer Loads identified by TSPs that currently do not have a signed Interconnection Agreement. This new data was further broken out by contracted load only, and both contracted load and non-contracted load

The summer and winter reserve margins from the CDR are as follows, including reserve margins which result when non-contracted load is considered. If only new contracted load is considered, the winter reserve margins would be 22.4% for 2026/2027 and 14.1% for 2027/2028 (versus the lower numbers in the chart below which includes non-contracted loads)

May 2024 CDR
Summer
           Reserve Margin           Reserve Margin
         (Standard Forecast)     (with New Contracted 
                                 & Non-contracted Load)

2025         46.0%                     33.9%
2026         58.2%                     23.7%
2027         64.0%                     12.8%
2028         56.5%                     -2.4%
2029         54.8%                     -4.3%


Winter
2025/2026   43.4%                     26.7%
2026/2027   41.9%                      7.8%
2027/2028   39.3%                     -6.7%
2028/2029   36.3%                    -18.4%
2029/2030   33.8%                    -21.6%

Link to CDR

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