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March 20, 2026

CAISO/WEIM

The California Independent System Operator serves about 80% of California's electricity demand, including the service areas of the state's three investor-owned utilities. It also operates the Western Energy Imbalance Market, an interstate real-time market covering territory that accounts for 80% of the load in the Western Interconnection.
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CAISO to Depart Peak Reliability, Become RC
CAISO officials said they “reluctantly” plan for the ISO to become a reliability coordinator (RC) by spring 2019 and will depart from Peak Reliability.
Southern California Edison
FERC Sets Hearing on SCE Tx Rates; Glick Dissents
FERC ordered hearing and settlement proceedings on Southern California Edison’s proposal to revise its transmission formula rate.
Calpine
FERC Orders Hearing, Settlement Talks for Calpine RMRs
FERC ordered hearing and settlement procedures in a dispute over reliability-must-run agreements filed by Calpine for generators in CAISO.
CAISO
CAISO Bid for Western RTO to Face Competition in 2018
The Energy Imbalance Market (EIM) expanded its footprint and ambitions in 2017 while new suitors lined up to compete with CAISO as the vehicle for a Western RTO.
‘Load Bias,’ Prices Rise in CAISO Q3
CAISO’s Department of Market Monitoring discussed the ISO’s third-quarter market results with participants.
CAISO
CAISO 2030 Vision Gets Mixed Reviews
Operators of traditional resources say the Vision 2030 paper drifts outside CAISO’s purpose of assuring reliability and managing markets.
CPUC Targets Wildfires, Multifamily Solar, RMRs
California regulators have approved new measures aimed at the prevention of wildfires, as utilities face growing scrutiny.
Montana PURPA Solar Saga Continues in State Court
Three solar advocates filed a joint challenge to the Montana PSC’s decision to alter the contract terms available to small generators under PURPA.
CAISO Board OKs New Generator Rules, Budget
CAISO’s Board of Governors approved new generator contingency modeling, rules extending time for generator interconnections and EIM enhancements.
CAISO Plan Extends Day-Ahead Market to EIM
CAISO is floating a proposal that would extend many of the features of its day-ahead market into the footprint of the EIM.

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