Search
March 20, 2026

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.
CAISO
Tight Supplies, Solar Ramps Drive CAISO Summer Spikes
CAISO day-ahead prices hit all-time highs for the second time this year during the third quarter, the ISO’s Department of Market Monitoring said.
© RTO Insider
California Proposes Resource Adequacy Obligations for CCAs
California regulators are set to vote next month on a proposal that CCAs be subject to the resource adequacy requirements of electric utilities.
Kirha Quick for WECC
WECC Finding New Direction in Old Mission
The Western Electricity Coordinating Council (WECC) board of directors endorsed a new three-year operating plan for the organization.
PJM Unit to Help Develop Western Markets
PJM and reliability coordinator Peak Reliability announced Thursday they will explore the development of electric markets and other services in the West.
SCE
UPDATED: California Fires Spark CAISO Transmission Emergency
CAISO extended an electric transmission emergency in Ventura County because of raging wildfires in Southern California.
EIM Governing Body Approves ‘Consolidated’ Initiatives
The EIM Governing Body approved a set of market initiatives that represents a narrowed-down version of a package CAISO had proposed.
SoCalGas Pipeline Losses Spur Curtailment Warnings
The loss of three natural gas pipelines is creating major concerns about Southern California’s gas and electricity supplies.
Besieged CPUC Denies SDGE Wildfire Recovery
Utilities are at the epicenter of public battles between the California PUC and its critics over wildfires, public safety and ethics.
© RTO Insider
Hydro, Jointly Owned Coal Face EIM Challenges
Speakers at a CAISO Regional Issues Forum discussed their approach to effectively integrating hydropower, coal and jointly owned plants into the EIM.
California Governor's Office of Emergency Services
Thumbs Up/Down for CAISO Gas Constraint Measures
FERC approved CAISO’s request to extend temporary market measures instituted last year in response to the closure of Aliso Canyon.

Want more? Advanced Search