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December 27, 2025

California Independent System Operator (CAISO)

New CAISO Rules Spell Increased DER Role
The CAISO Board of Governors approved a set of market rules designed to aid the integration of distributed energy resources and energy storage.
Q2 2017 Earnings Briefs
Calpine, PG&E and Southern California Edison released their second-quarter earnings results last week.
RTOs to Congress: Don’t Lose Faith in Markets
RTO officials acknowledged their challenges but asked Congress not to depart from 20 years of supporting wholesale markets.
UPDATED: Aliso Canyon Resumes Injections
L.A. County officials asked a state court to halt the resumption of natural gas withdrawals from Aliso Canyon until more risks are analyzed.
NARUC: Growth in DER Creates New Challenges
Industry officials discussed the latest developments in distributed energy resources (DER) at the NARUC Summer Policy Summit.
Public Power Takes PJM Gripes to Congress
While PJM stakeholders were meeting to consider yet more changes to the Reliability Pricing Model, public power representatives took their case to Congress.
California Officials: Aliso Canyon Safe to Open
California officials cleared the Aliso Canyon natural gas storage facility to resume injections, even as momentum builds to permanently close the site.
CAISO Solar Eclipse Prep Relies on Conventional Mix
CAISO will lean heavily on increased output from conventional generators to make up for lost solar power during next month’s solar eclipse.
California Lawmakers Extend Cap-and-Trade
Both houses of the California State Legislature voted late Monday to extend the state’s greenhouse gas (GHG) cap-and-trade program until 2030.
EIM Leaders Endorse CAISO Gas Constraint Measure
EIM leaders endorsed a CAISO proposal that would allow the ISO to constrain output from natural gas-fired plants across the market.

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