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March 15, 2026

California Independent System Operator (CAISO)

Microsoft
CAISO Developing Large Loads Technical Standards
Although large loads are not new to California or the West, CAISO is formulating technical standards that address their potential boom over the coming years.
© RTO Insider 
EDAM Governance Questioned During NV Energy Hearing
As Nevada regulators consider NV Energy's request to join CAISO's Extended Day-Ahead Market, the debate over the independence of EDAM's governance is intensifying.
CAISO DMM
Battery Capacity, Coal Use Rise in WEIM in 2025
CAISO’s Western Energy Imbalance Market saw an increase in battery storage capacity and coal use in 2025 compared with 2024, although the total load across the market did not increase over the year.
CAISO
EDAM Opening Schedule on Track Despite Lingering Testing Issues
It’s an “all-hands-on-deck” moment for CAISO to open its extended day-ahead market in less than two months, CAISO’s CEO Elliot Mainzer said at a Western Energy Market Board of Governors meeting.
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Top CAISO, SPP Executives Talk Competition and Collaboration
Conversations remained cordial despite the ongoing competition between CAISO and SPP in the west as the RTOs’ top executives took the stage at Yes Energy’s annual EMPOWER conference.
Black Hills Corp.
Black Hills, PowerWatch to Join WEIM in May
Black Hills Energy and PowerWatch are to join CAISO’s Western Energy Imbalance Market, extending the market’s geographical reach into South Dakota, the ISO announced.
BLM California
CPUC Orders Massive 6 GW of New Capacity to Feed Data Centers, Other Loads
The California Public Utilities Commission ordered 6 GW of new capacity to meet forecast data center and electric vehicle loads — among other new demand — in the state.
© RTO Insider
CAISO Unveils Principles for Western Seams Coordination
CAISO released a set of guiding principles for upcoming discussions about seams between the ISO, SPP and other entities as the Extended Day-Ahead Market nears its opening in May.
Shutterstock
FERC Eliminates Western ‘Soft’ Price Cap
FERC has rescinded the West-wide wholesale electricity price cap mechanism it implemented in response to widespread price manipulation during the Western energy crisis of 2000/01, saying development of new markets and expanded authority has led to improved monitoring capabilities.
California Senate
CPUC President Alice Reynolds Out, Joins CAISO Board
California Public Utilities Commission President Alice Reynolds is leaving the CPUC and joining CAISO’s Board of Governors after more than four years at the helm of the state’s utility regulator.

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