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December 5, 2025

California Independent System Operator (CAISO)

CAISO
CAISO Opens Bidding Process for $900M in Transmission Projects
CAISO is soliciting bids for two transmission projects in the San Francisco Bay Area to prepare the state for more projected data center load in the coming decade.
CAISO
Inland Wind, Merchant Projects, WestTEC to Guide CAISO Interregional Planning
Out-of-state wind integration, merchant transmission development and the WestTEC planning effort are all factors influencing CAISO’s interregional transmission planning.
PacifiCorp
CAISO Approves New EDAM Congestion Revenue Allocation Design
CAISO's Board of Governors and the Western Energy Markets Governing Body approved a new method for allocating certain congestion revenues in the ISO's Extended Day-Ahead Market, set to launch in 2026
CAISO
CAISO Proposes Alternative Approach for Calculating RA Resources During Peak Times

CAISO is proposing a new method for verifying how much energy thermal resources can provide during peak conditions on California’s grid for resource adequacy purposes.

The Brattle Group
Expanded EDAM Would Reduce Curtailment, Costs, Study Finds

California Energy Commission staff presented a study on the size of CAISO’s Extended Day-Ahead Market, finding more benefits as the market’s footprint increases.

© RTO Insider 
CAISO EDAM Congestion Revenue Proposal Gains Support

Many stakeholders are now supporting CAISO’s proposed new method for allocating congestion revenues in EDAM after months of workshops and multiple proposals.

BLM California
CAISO Battery Storage Initiative Focuses on Outage Management, Nonlinearity

CAISO is moving forward with a key initiative to resolve how battery storage resources function on the grid as the battery boom continues in the Golden State. 

Shutterstock
Amended ‘Pathways’ Bill Boosts — and Complicates — Calif. Protections
The latest version of California’s “Pathways” bill strips out a previous amendment that would have given state regulators authority to order utilities to withdraw from the RO under certain circumstances.
The Imperial Irrigation District
Imperial Irrigation District Inks Agreement to Join CAISO Markets
CAISO said the Imperial Irrigation District has signed implementation agreements and will begin participating in the WEIM and EDAM in 2028.
Shutterstock
California’s ‘Pathways’ Bill Heading to Senate Floor

A California bill to implement the West Wide Governance Pathways Initiative’s Step 2 proposal is headed to the floor of the state Senate after being approved by the body’s Appropriations Committee.


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