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December 21, 2025

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.
NOAA
Risk from Variable Resources Increasing, WECC Says
WECC said the addition 80 GW of wind and solar resources to the Western grid in the next decade will require higher planning reserve margins than anticipated.
CARB
Pandemic Brings ‘Historic’ Decline to California GHGs in 2020
California’s GHG emissions dropped 8.7% in 2020, a decline that’s largely due to the impact of the COVID-19 pandemic, according to a new report.
Lion Electric
PG&E to Offer Nation’s First V2G Export Rate
Pacific Gas and Electric received regulatory approval to establish the nation’s first vehicle-to-grid export rates for commercial EVs, including school buses.
Shutterstock
CAISO Approves More Interconnection Enhancements
CAISO's Board of Governors approved additional interconnection enhancements to deal with the long queue of resources waiting to connect to its grid.
Pattern Energy
Effective Transmission Planning Requires Western RTO, Panelists Say
A Western RTO will be necessary to build the kind of grid needed to meet states' GHG goals, according to speakers on a panel hosted by ACEG.
U.S. Forest Service
PG&E Faces $255M in New Wildfire Fines, Costs
PG&E said in a Q3 earnings call it faces $100 million in costs from this year's Mosquito Fire, plus a $155 million fine for the deadly Zogg Fire in 2020.
Antelope Valley Transit Authorit
CARB Looks to Refine Clean Bus Rules Amid Ridership Decline
California transit agencies are enthusiastically adopting zero-emission buses, but regulators are worried that ridership downturns will stall ZEB progress.
SilRay
FERC Clarifies CAISO, NYISO Order 2222 Rulings
FERC clarified its June orders on CAISO and NYISO Order 2222 compliance filings while rejecting rehearing requests by consumer and environmental groups.
EOS
California Energy Commission Grants Long-Duration Storage Project $31M
A 60 MWh long-duration storage project using vanadium flow and zinc hybrid cathode batteries received a $31 million grant from the California Energy Commission.
© RTO Insider LLC
CAISO, NREL Start to Study Western Cooperation
CAISO began a stakeholder process under ACR 188, a legislative request to examine the economic and environmental benefits of regional cooperation in the West.

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