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The CET has been updated in version 25.1 to address issues in the 2024 Gas Avoided Cost tables, Societal Cost Test (SCT) calculations, and to update RIM calculation code, FuelID validations, and the CET’s output fields. This version of the CET utilizes the same input file that was updated for version 25.0 in May, 2025.&nbsp; Please read on for information about each update in this release.<div data-type="horizontalRule"><hr></div><h2>2024 Gas Avoided Cost Tables</h2>An error in earlier interpretation of the gas avoided cost tables in the E3 ACC resulted in the CET referencing the 20-year methane leakage values instead of 100-year methane leakage values.&nbsp; This has been updated&nbsp;(see documentation on CEDARS, below)&nbsp;with CET version 25.1 now correctly referencing 100-year methane leakage values.&nbsp;While testing the table update, PAs noted that their gas measures showed lower gas benefits in the range of 1% lower.<div data-type="horizontalRule"><hr></div><h2>Societal Cost Test (SCT)</h2><table style="minWidth: 270px"><colgroup><col style="width: 245px"><col></colgroup><tbody><tr><td colspan="1" rowspan="1" colwidth="245">First integrated into the CET</td><td colspan="1" rowspan="1">Release 25.0</td></tr><tr><td colspan="1" rowspan="1" colwidth="245">Decision</td><td colspan="1" rowspan="1"><a target="" rel="noopener noreferrer nofollow" class="link" href="https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M535/K822/535822173.PDF?">D.24-07-01</a></td></tr></tbody></table>For the version 25.1 release, the Societal cost test has been fully implemented and results of this test for both the base and high case scenarios are shown in the outputs table. <div data-type="horizontalRule"><hr></div><h2>Ratepayer Impact Measure (RIM)</h2><table style="minWidth: 270px"><colgroup><col style="width: 245px"><col></colgroup><tbody><tr><td colspan="1" rowspan="1" colwidth="245">Last modified in the CET</td><td colspan="1" rowspan="1">Release 25.0</td></tr><tr><td colspan="1" rowspan="1" colwidth="245">Decision</td><td colspan="1" rowspan="1"><a target="_blank" rel="noopener noreferrer nofollow" class="link" href="https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M293/K833/293833387.PDF">D.19-05-019</a></td></tr></tbody></table>Version 25.1 updates the RIM calculation code with intermediary calculations to properly take into account fuel substitution and rate data necessary to calculate rate impacts for CET avoided cost versions 2024 and 2026, as well as updated logic to&nbsp;apply the correct year of rates to the RIM calculations.<ul><li>New Intermediary Calculations (not output)<ul><li><code>RIMBenElec</code> – Calculates bill increases for the new electric fuel in fuel substitution; used to populate <code>BillIncrElec</code>.</li><li><code>RIMBenGas</code> – Calculates bill increases for the new gas fuel in fuel substitution; used to populate <code>BillIncrGas</code>.</li></ul></li><li>Formula Updates<ul><li>RIMRatio – Added BillIncrElec and BillIncrGas to the numerator</li><li>RIMRatioNoAdmin – Added BillIncrElec and BillIncrGas to the numerator</li></ul></li></ul><div data-type="horizontalRule"><hr></div><h2>FuelID</h2><table style="minWidth: 288px"><colgroup><col style="width: 263px"><col></colgroup><tbody><tr><td colspan="1" rowspan="1" colwidth="263">First integrated into the CET</td><td colspan="1" rowspan="1">Release 25.0</td></tr><tr><td colspan="1" rowspan="1" colwidth="263">Commission Resolution</td><td colspan="1" rowspan="1"><a target="" rel="noopener noreferrer nofollow" class="link" href="https://docs.cpuc.ca.gov/SearchRes.aspx?docformat=ALL&amp;docid=551490624">E-5350</a></td></tr></tbody></table>Version 25.1 includes a validation for the new FuelID field that was added to the CET input file specification in 25.0.&nbsp; This field is required in the input file as part of the data structure, but the field can be left empty for 2026-2027 budget filings and claims.For measure packages without a FuelID where the field is left empty, namely pre-2026 measures, the CET will reference MeasImpactType to determine if a measure is fuel substitution. This only applies prospectively to 2026- 2027; this does not apply if PY2025 is selected.<div data-type="horizontalRule"><hr></div><h2>Specification Documentation Resources Update </h2>The CET specification <a target="" rel="noopener noreferrer nofollow" class="link" href="https://cedars.cpuc.ca.gov/cet_ui/spec/">Documentation Resources</a> section was updated to include the following:<ul><li>Added 2026 v25.1 Electric and Gas Rate Tables </li><li>Added 2026 v251 Updated Electric and Gas Avoided Cost Data</li><li>Added 2025 CET Database Version 25.1</li><li>Added 2025 CET Database Version 25.1 Documentation</li></ul><img data-width="75%" data-align="left" data-featurebase-content-key="64defea38b15fc2614cb036f/changelog/6865f515969c8c21e64c7331/0198c552-9e41-7f33-a1ce-1a0b25e31de5/b64u-U2NyZWVuc2hvdCAyMDI1LTA4LTE5IGF0IDcuMjcuMzjigK9QTS5wbmc.png" data-featurebase-content-filename="Screenshot 2025-08-19 at 7.27.38 PM.png" src="https://64defea38b15fc2614cb036f.featurebase-attachments.com/c/changelog/6865f515969c8c21e64c7331/0198c552-9e41-7f33-a1ce-1a0b25e31de5/b64u-U2NyZWVuc2hvdCAyMDI1LTA4LTE5IGF0IDcuMjcuMzjigK9QTS5wbmc.png?X-Amz-Expires=3600&amp;X-Amz-Date=20260923T040000Z&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=DO801TYC4FCVNNEKURKM%2F20260923%2Ffra1%2Fs3%2Faws4_request&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Signature=18166545390643fbcb641bc5f680d16caf43eb2b8c2069bf2a7aa4e474527c84"><div data-type="horizontalRule"><hr></div><h2>CET Outputs file</h2>The inputs files that is included in the CET outputs.zip now includes all input fields that were provided to run the CET. Added fields:<ul><li><code>RateScheduleElec</code></li><li><code>RateScheduleGas</code></li><li><code>MeasInflation</code></li><li><code>FuelID</code></li></ul><div data-type="horizontalRule"><hr></div><h2>New Output Fields</h2>CET 25.1 introduces several new outputs that enhance transparency for societal and RIM-related calculations.<table style="minWidth: 287px"><colgroup><col style="width: 262px"><col></colgroup><tbody><tr><td colspan="1" rowspan="1" colwidth="262">New CET Output Field</td><td colspan="1" rowspan="1">Definition</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>GasBen_SB</code></td><td colspan="1" rowspan="1">Net societal base-case gas benefits</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>GasBen_SH</code></td><td colspan="1" rowspan="1">Net societal high-case gas benefits</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>GasBenGross_SB</code></td><td colspan="1" rowspan="1">Gross societal base-case gas benefits</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>GasBenGross_SH</code></td><td colspan="1" rowspan="1">Gross societal high-case gas benefits</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>WaterEnergyBen_SB</code></td><td colspan="1" rowspan="1">Net societal base-case water-energy benefits</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>WaterEnergyBen_SH</code></td><td colspan="1" rowspan="1">Net societal high-case water-energy benefits</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>WaterEnergyBenGross_SB</code></td><td colspan="1" rowspan="1">Gross societal base-case water-energy benefits</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>WaterEnergyBenGross_SH</code></td><td colspan="1" rowspan="1">Gross societal high-case water-energy benefits</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>GasSupplyCost_SB</code></td><td colspan="1" rowspan="1">Net societal base-case gas supply costs</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>GasSupplyCost_SH</code></td><td colspan="1" rowspan="1">Net societal high-case gas supply costs</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>GasSupplyCostGross_SB</code></td><td colspan="1" rowspan="1">Gross societal base-case gas supply costs</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>GasSupplyCostGross_SH</code></td><td colspan="1" rowspan="1">Gross societal high-case gas supply costs</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>WaterEnergyCost_SB</code></td><td colspan="1" rowspan="1">Net societal base-case water-energy costs</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>WaterEnergyCost_SH</code></td><td colspan="1" rowspan="1">Net societal high-case water-energy costs</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>WaterEnergyCostGross_SB</code></td><td colspan="1" rowspan="1">Gross societal base-case water-energy costs</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>WaterEnergyCostGross_SH</code></td><td colspan="1" rowspan="1">Gross societal high-case water-energy costs</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>BillIncrElec</code></td><td colspan="1" rowspan="1">Fuel substitution bill increases for electric</td></tr><tr><td colspan="1" rowspan="1" colwidth="262"><code>BillIncrGas</code></td><td colspan="1" rowspan="1">Fuel substitution bill increases for gas</td></tr></tbody></table>These changes ensure the CET aligns with current CPUC cost-effectiveness policy expectations, particularly in valuing societal impacts and tracking real ratepayer costs when fuel switching occurs.

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