CAISO Website
The California Independent System Operator (CAISO) operates a competitive wholesale electricity market and manages the reliability of its transmission grid. CAISO provides open access to the transmission and performs long-term planning. In managing the grid, CAISO centrally dispatches generation and coordinates the movement of wholesale electricity in California and a portion of Nevada. CAISOs markets include energy (day-ahead and real-time), ancillary services, and congestion revenue rights. CAISO also operates an Energy Imbalance Market (EIM), which currently includes CAISO and other balancing authority areas in the western United States.
CAISO was founded in 1998 and became a fully functioning ISO in 2008. The Energy Imbalance Market launched in 2014 with PacifiCorp as the first member or EIM Entity. The EIM serves parts of Arizona, Oregon, Nevada, Washington, California, Utah, Wyoming and Idaho.
List of Orders
Click on the categories below to view additional information.
| Docket No. |
Date Issued |
Company |
Title |
|
ER24-494-000
|
02/15/2024 |
California Independent System Operator Corporation
|
Letter Order Granting Request for Petition
|
|
ER24-355-000
|
02/15/2024 |
California Independent System Operator Corporation |
Letter Order Granting Petition |
| Docket No. |
Date Issued |
Company |
Title |
|
EL22-62-000
|
09/21/2023 |
California Independent System Operator Corporation
|
Order on Show Cause Proceeding
|
| ER21-2455-003 |
05/18/2023 |
California Independent System Operator Corporation |
Order on Compliance Filing |
| ER22-2362-000 |
04/20/2023 |
California Independent System Operator Corporation |
Order On Compliance Filing |
| Docket No. |
Date Issued |
Company |
Title |
| ER22-2730-000 |
12/15/22 |
California Independent System Operator Corporation |
Letter Order Granting Petition |
| ER21-2455-002 |
10/20/22 |
California Independent System Operator Corporation |
Order Addressing Arguments Raised on Rehearing and Granting Clarification |
| EL22-62-000 |
07/28/22 |
California Independent System Operator Corporation |
Proposed Revisions to Credit Practices in Organized Wholesale Electric Markets |
| ER21-2455-000 |
06/17/22 |
California Independent System Operator Corporation |
Order on Compliance Filing |
| ER22-1246-000 |
05/20/22 |
California Independent System Operator Corporation |
Order Accepting Tariff Revisions |
| ER20-1075-002 |
04/21/22 |
California Independent System Operator Corporation |
Order on Remand |
| Docket No. |
Date Issued |
Company |
Title |
| EL21-70-000 |
11/18/21 |
Luna Valley Solar I, LLC v. Pacific Gas and Electric Company and California Independent System Operator Corporation |
Order Denying Complaint |
| EL21-74-000 |
07/15/21 |
Nevada Power Company and Sierra Pacific Power Company v. California Independent System Operator Corporation |
Order Dismissing Complaint |
| ER04-835-014 |
06/17/21 |
California Independent System Operator Corporation Rehearing Work Item 1 of 1 |
Order Addressing Arguments Raised on Rehearing |
| EL20-69-001 |
06/17/21 |
CAlifornians for Renewable Energy, et al. v. California Independent System Operator Corporation, et al. EL20-69-001. Rehearing 1 of 1 |
Order Addressing Arguments Raised on Rehearing |
| EL00-95-291 |
05/20/21 |
San Diego Gas & Electric Company v. Sellers of Energy and Ancillary Services |
Order Accepting Settlement Overlay Compliance Filing |
| EL00-95-310 |
05/20/21 |
San Diego Gas & Electric Company v. Sellers of Energy and Ancillary Services |
Order Addressing Arguments Raised On Rehearing |
| EL00-95-301 |
05/20/21 |
San Diego Gas & Electric Company v. Sellers of Energy and Ancillary Services |
Order Addressing Arguments Raised on Rehearing |
| ER21-395-000 |
04/15/21 |
California Independent System Operator Corporation |
Order Dismissing Waiver Requests |
| EL20-69-000 |
03/18/21 |
CAlifornians for Renewable Energy, et al. v. California Independent System Operator Corporation, et al. |
Order Denying Complaint and Notice of Intent Not to Act |
| Docket No. |
Date Issued |
Company |
Title |
| ER20-2890-000 |
11/19/20 |
California Independent System Operator Corporation |
Letter Order Accepting Tariff Revisions |
| ER20-2604-000 |
10/15/20 |
California Independent System Operator Corporation. |
Letter Order Granting Distribution of Interconnection Study Proceeds |
| ER20-1890-000 |
09/17/20 |
California Independent System Operator Corporation |
Order Accepting Tariff Revisions Subject to Condition |
| EL14-37-000 |
07/16/20 |
California Independent System Operator Corporation |
Order on Compliance |
| ER19-468-002 |
07/16/20 |
California Independent System Operator Corporation |
Order on Compliance Filing |
| ER19-2347-001 |
06/18/20 |
California Independent System Operator Corporation |
Order Denying Rehearing and Granting Clarification |
| ER19-538-001 |
02/20/20 |
California Independent System Operator Corporation |
Order Denying Rehearing |
| ER19-1950-000 |
02/20/20 |
California Independent System Operator Corporation |
Order on Compliance |
| Docket No. |
Date Issued |
Company |
Title |
| ER19-468-000 |
11/21/19 |
California Independent System Operator Corp |
Order on Compliance Filing |
| EL18-177-001 |
10/17/19 |
CXA La Paloma, LLC v. California Indep. Sys. Operator Corp., |
Order Denying Rehearing |
| EL19-81-000 |
10/17/19 |
Nevada Hydro Company, Inc. v. California Independent System Operator Corporation |
Order Denying Complaint |
| ER18-1169-002 |
02/21/19 |
California Independent System Operator Corporation |
Order on Rehearing |
| ER19-308-000 |
02/21/19 |
California Independent System Operator Corporation |
Order Granting Petition |
| ER19-538-000 |
02/21/19 |
California Independent System Operator Corporation |
Order on Tariff Revisions |
| Docket No. |
Date Issued |
Company |
Title |
| ER17-411-000 |
01/19/17 |
California Independent System Operator Corporation |
Letter Order Accepting, Subject to Condition, CAISO’s Agreement to Procure Transferred Frequency Response From The City of Seattle, By and Through Its City Light Department |
| ER17-408-000 |
01/19/17 |
California Independent System Operator Corporation |
Letter Order Accepting, Subject to Condition, CAISO’s Agreement to Procure Transferred Frequency Response From Bonneville Power Administration |
| Docket No. |
Date Issued |
Company |
Title |
| ER04-835-000, EL04-103-000, EL14-67-000, ER04-835-007, ER04-835-009, EL04-103-000, & EL04-103-004 |
10/20/16 |
California Independent System Operator Corporation
Pacific Gas and Electric Company
v.
California Independent System Operator Corporation
The Alliance for Retail Energy Markets
Shell Energy North America (US), L.P.
v.
California Independent System Operator Corporation
California Independent System Operator Corporation
Pacific Gas and Electric Company
v.
California Independent System Operator Corporation |
Order on Informational Refund Report, Complaint, And Informational Filing |
| ER16-1649-004, -005 |
10/20/16 |
California Independent System Operator Corporation |
Order Granting Petition for Extension Of Limited Waiver and Dismissing Motion for Clarification |
| ER16-1649-000 |
06/01/16 |
California Independent System Operator Corporation |
Order Accepting Tariff Revisions, Subject To Condition, and Establishing A Technical Conference |
| ER15-1825-001 |
03/17/16 |
California Independent System Operator Corporation |
Order On Rehearing |
| ER15-1783-001 |
01/21/16 |
California Independent System Operator Corporation |
Order Granting Clarification |
| Docket No. |
Date Issued |
Company |
Title |
| EL15-94-000 |
12/17/15 |
Shell Energy North America (US), L.P.
v.
California Independent System Operator Corporation |
Order Denying Complaint And Granting Waiver |
| EL14-22-000 |
12/17/15 |
California Independent System Operator Corporation |
Order On Compliance Filing |
| ER15-861-006 |
12/17/15 |
California Independent System Operator Corporation |
Order On Compliance Filing |
| ER15-2588-000 |
11/19/15 |
Eastside Power Authority |
Order Denying Waiver |
| ER15-2550-000 |
11/19/15 |
Rancho Cucamonga Municipal Utility |
Order Denying Waiver |
| EL15-47-001 |
11/19/15 |
NextEra Desert Center Blythe, LLC
v.
California Independent System Operator Corporation |
Order Denying Rehearing |
| ER15-861-004 |
11/19/15 |
California Independent System Operator Corporation |
Order On Compliance Filing |
| ER15-2281-000, ER15-2282-001, and ER15-2283-000 |
11/19/15 |
Nevada Power Company
Sierra Pacific Power Company
PacifiCorp |
Order On Proposed Market-Based Rate Tariff Changes |
| ER15-2272-000 |
11/19/15 |
California Independent System Operator Corporation |
Order Authorizing Mitigation At Energy Imbalance Market Interties |
| ER14-2017-001 |
11/19/15 |
California Independent System Operator Corporation |
Order Accepting Compliance Filing |
| ER15-2623-000 and ER15-2625-000 |
11/19/15 |
Nevada Power Company |
Order Rejecting Proposed Agreements |
