2023 NERC/WECC Metered Demand Calculations for Assessment Year 2025

The California ISO has posted North American Electric Reliability Corporation/Western Electricity Coordinating Council (NERC/WECC) information files to the Market Results Interface - Settlements (MRI-S) and the Secure File Transfer Protocol (SFTP) server on June 3, 2024. The files contain the NERC/WECC metered demand for assessment year 2025 for scheduling coordinator (SC) review, pursuant to ISO tariff section 11.20.4(a).

Information files can be retrieved in MRI-S by selecting NERC WECC INFO as the run type and setting the post date to 06/03/2024. The files are available on MRI-S and SFTP for 45 calendar days after publication. SCs are advised to download the files for validation purposes and future reference.

Item	Value	Unit
Total NERC/WECC Metered Demand for Calendar Year 2023	209,498,742.66	MWh
Estimated Preliminary NERC/WECC Charge Rate for Assessment Year 2025	0.048774698	$/MWh

2023 NERC/WECC metered demand is the summation of monthly NERC/WECC metered demand quantities published previously in the T+11M recalculation statements for January 2023 through June 2023, and T+70B recalculation statements for July 2023 through December 2023. Details regarding assessment of Charge Code 6490 NERC/WECC Charge are provided in the Settlements and Billing Business Practice Manual (BPM) configuration guide

The NERC/WECC information files combined with this notice shall serve as written notification of each SC's NERC/WECC metered demand for 2023.

Beginning June 3, 2024, each SC will have 60 calendar days to raise any disputes concerning the data calculation.

Contact information

Please contact ISO Customer Service at 916-608-7320 with any questions.