Image
Cost savings for participants in both markets continue to grow

Real-Time and Day-Ahead Markets continue to demonstrate strong performance

Read the news release

California ISO

Today's Outlook As of: --/--/----, --:-- PT

View Today's Outlook

Grid status

Loading
--,--- MW
Current capacity
--,--- MW
Current demand
--,--- MW
Forecasted peak
--,--- MW
Current renewables
--%
Renewables serving demand

Upcoming calendar

View full calendar
 

Participating with the ISO

Getting Started

The power industry is changing fast — and that creates opportunities for new participants to enter our competitive market. Be a scheduling coordinator, connect to the grid, or bid into our markets.

Become a participant with the ISO

Western Energy Imbalance Market (WEIM)

WEIM is a wholesale energy trading market for the West. Our scalable and flexible platform allows entities to join in a timeframe that works for their business.

Join the WEIM real-time marketLearn how WEIM works

Extended Day-Ahead Market (EDAM)

EDAM builds on the economic, reliability, and environmental benefits of the Western Energy Imbalance Market (WEIM) by optimizing the use of existing transmission and resources in the much larger day-ahead timeframe across an expanded footprint.

Learn more about EDAMJoin the EDAM

RC West

The ISO's RC West is the Reliability Coordinator (RC) of record for many balancing authorities and transmission operators in the western United States. An RC oversees grid compliance with federal and regional grid standards, and can determine measures to prevent or mitigate system emergencies in day-ahead or real-time operations.

Learn about RC West

Request application access

Confidential information and data communicated between the ISO and its participants during the course of planning and market activities are protected through robust systems and application security. All systems and applications, except OASIS, require an User Access Administrator (UAA) to grant access and removal.

Learn about requesting access and certificatesBecome a UAA

Product and services

The ISO wholesale energy market is comprised of distinct day-ahead and real-time processes. The energy products and services traded in our market allow us to meet reliability needs and serve load. The market also offers services in which qualified entities can buy and sell congestion revenue rights and engage in convergence bidding activities.

Learn about our products and services

Resource adequacy

The reliability requirements and resource adequacy programs provide deliverability criteria that each load serving entity must meet, and provide rules for counting resources that must be made available to the ISO. The ISO reliability requirements program is intended to complement the state's efforts to implement resource adequacy programs.

Learn about resource adequacy

Extended Day-Ahead Market Performance on Nov. 24, 2026 at 9 AM - 11 AM

The California ISO will host a new monthly meeting series to discuss Extended Day-Ahead Market (EDAM) market performance during the initial months following market launch.

See details

Extended Day-Ahead Market Congestion Revenue Allocation meeting on Nov. 9, 2026

This meeting is being held online and in-person. This initiative focuses on evolving and enhancing a methodology for allocating congestion revenues within EDAM.

See details

Folsom control room homepage

About the California ISO

The ISO manages the flow of electricity across high-voltage, long-distance power lines that make up 80 percent of California's and a small part of Nevada's grid. The nonprofit public benefit corporation also operates a competitive wholesale energy market, and conducts transmission planning to identify grid expansion needs.

Learn more about our businessGet to know our leadership

Back to top