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December 5, 2025

capacity accreditation factors (CAFs)

Ben Schumin, CC BY-SA-2.0, via Wikimedia
NYISO Unveils Changes to Demand Curve
NYISO has proposed to stop using “winter to summer” and “summer to winter” ratios to determine maximum clearing and reference point prices in its seasonal demand curves.  
Plaza Construction
NYISO Drops Seasonal CAFs from Winter Reliability Project
NYISO told stakeholders it was no longer considering seasonal capacity accreditation factors because it found they would disincentivize participation in the capacity market.
NYISO
NYISO Presents Informational CAFs for Non-firm Generators
NYISO provided a glimpse into the possible capacity accreditation factors for gas generator units that have not guaranteed a supply of fuel for the winter capability period.
Z22, CC-BY-SA 4.0, via Wikimedia Commons
NYISO Monitor Analyzing Alternative Capacity Market Designs
The NYISO Market Monitoring Unit told stakeholders it is independently analyzing the capacity market in parallel with the ISO’s ongoing Capacity Market Structure Review project.

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