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December 21, 2025

California Independent System Operator (CAISO)

CAISO Avoids Blackouts amid Brutal Heat, Fires
Amid another heat wave and raging wildfires, CAISO called for massive conservation efforts and aid from neighboring utilities.
CAISO Readies for Weekend Heat Wave
CAISO called for extra capacity and conservation and put grid maintenance on hold as it faces a Labor Day weekend heat wave.
OTC Plants to Remain Open, Calif. Water Board Rules
Four aging natural gas plants scheduled to retire in December will keep operating because of California’s anticipated capacity shortfall.
CPUC OKs 1.2 GW of Storage by 2021, 38,000 EV Chargers
The California PUC greenlit a major expansion of the state's EV charging program and approved contracts signed by investor-owned utilities to procure 1.2 GW of battery storage.
Theories Abound over California Blackouts Cause
Observers cited dependence on imports, underperformance of natural gas and wind, and market manipulation as possible causes of California’s recent blackouts.
CAISO Finalizes ESDER Phase 4 Proposal
CAISO presented its final proposal of its effort to make it easier for energy storage and distributed energy resources to participate in markets.
CAISO Provides More Details on Blackouts
CAISO and the California PUC and Energy Commission explained to Gov. Gavin Newsom why the state had two days of rolling blackouts recently.
PGE Traders Burned by California Heat Wave
PGE (NYSE: POR) said it suffered $127M in losses from wholesale electricity trades due to recent volatility in California's energy market.
‘Last Challenging Night’ for CAISO, Governor Hopes
A grueling heat wave that caused rolling blackouts and sparked wildfires across California is expected to abate somewhat starting Thursday.
CAISO Blames Blackouts on Inadequate Resources, CPUC
CAISO said millions of residents could be blacked out this week because it does not have enough power to meet demand during the heat wave.

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