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December 5, 2025

Reserves

MISO
MISO on Track to Wrap Summer with 122-GW Peak, Addresses Frequent South Advisories
MISO is poised to close the door on summer with an almost 122-GW peak while issuing several capacity advisories for MISO South.
Shutterstock
NYISO BIC Dissects Power Prices During June Heat Wave
NYISO shared a detailed analysis of New York’s late June heat wave, in which significant operating reserve shortages elevated energy prices.
IESO
IESO Seeks Feedback on Revised Storage Model
IESO opened discussions on new rules for storage facilities and hybrid resources that will enable the provision of regulation service.
Constellation Energy
FERC Approves Constellation Purchase of Calpine with Conditions
FERC approved Constellation's purchase of Calpine, which will create an even bigger IPP with nearly 60 GW around the country, with the biggest share of that in PJM.
© RTO Insider
ERCOT Board of Directors Briefs: June 23-24, 2025
ERCOT CEO Pablo Vegas has gone public with the grid operator’s internal terminology that is shaping the market’s path forward, defining it for his Board of Directors and stakeholders. 
MISO
MISO Declares Max Gen Emergency in Heat Wave
MISO Midwest entered emergency status during the RTO’s first serious heat wave of the summer.
Power Advisory
Operating Reserve Prices Surge in Ontario

The opening of Ontario’s nodal market has been marked by real-time volatility and unusually high operating reserve prices.

NOAA
SPP ‘Confident’ in Meeting Demand this Summer
SPP expects to have a “high probability” of enough generation to meet demand during peak-use hours this summer, despite predictions of higher-than-average temperatures in the RTO’s footprint.
Danskammer Energy
Stakeholders Urge NYISO to Change Performance Penalty Proposal
Stakeholders expressed confusion and concern with the most recent updates to NYISO’s operating reserves performance penalty proposal.
© RTO Insider 
PJM MIC Briefs: May 7, 2025
PJM’s Market Implementation Committee discussed a proposal to revise its governing documents to allow DR resources to participate in the regulation market when there may be energy injected at the customer’s point of interconnection

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