Requirements and Processes for Interconnection Projects

  • Please review our Queue Cluster (QC) 16 presentation: QC16 Presentation.
  • Please use this link to access the Grid Interconnection Processing Tool.
    • We are currently accepting new Wholesale Distribution Access Tariff (WDAT) Interconnection Requests and Rule 21 Non-Export requests in the tool. Please see the Rule 21 page for more information regarding submittal of Rule 21 Export requests.

For more information, please see the following section of our website: Grid Interconnection Processing Tool (GIPT) Information.

The information on this page is intended to help our customers understand the requirements and processes for interconnecting projects to SCE’s electric system.

You can navigate through the sections below or you can get started by reviewing our introduction to SCE’s Generator Interconnection Processes.

 

Announcements
 

  • Distribution Group Study (DGS) Application Window #22, Opening Date: Saturday, August 15, 2026. Closing Date: Tuesday, September 15, 2026. For more information, view SCE’s Rule 21 page.

  • On October 30, 2025, from 10-11am Pacific Time via Teams only, pursuant to a requirement in the WDAT storage settlement, SCE will hold a call to provide an update on the status of the implementation of SCE’s distributed energy resource management system (“DERMS”) as it pertains to energy storage. 

    The relevant requirement in the settlement is the following:

    Reporting Obligations Related to Firm Window Service

    4.13. SCE is committed to exploring whether it can offer a service whereby a storage Resource can have a combination of Firm Charging Distribution Service and As-Available Charging Distribution Service that changes on an hourly basis (“Firm Window Service”). For the extent of the Moratorium, SCE will host a call once a year in the month of October to provide an update on the status of the implementation of SCE’s distributed energy resource management system (“DERMS”) as it pertains to energy storage. SCE will provide thirty days’ notice of this call to the Parties, shall post a notice on its website, and shall serve a notice on all then-current WDAT customers, including those in the queue, pursuant to the requirements for service under 18 C.F.R. § 35.2(e).

    Microsoft Teams Need help? 
    Join the meeting now 
    Meeting ID: 257 590 834 305 1 
    Passcode: XQ6q28d7 
    Dial in by phone 
    +1 213-297-0156,,172038460# United States, Los Angeles
    Find a local number
    Phone conference ID: 172 038 460#

     

  • On March 13, 2026 SCE shared the following 2026 Unit Cost Guide Pre-Posting Presentation:
    SCE 2026 Unit Cost Guide Pre-Posting Presentation_Final.pdf
  • WDAT Queue Cluster Window #16 (QC16) is anticipated to open on Friday, September 11, 2026, and to close on Friday, September 25, 2026. SCE may modify the dates based on CAISO’s Cluster study schedule.
  • On August 14, 2024, SCE submitted its Order No. 2023 compliance filing with FERC in Docket No. ER24-2776. SCE requested an effective date of August 15, 2024. Accordingly, as of August 15, 2024, no WDAT Independent Study Process (ISP) Interconnection Requests will be accepted.
  • As of Monday, July 19, 2021, the new Rule 21 Non-Export Notification Only Process for pre-approved developers became available. Additional information about eligibility, becoming a pre-approved developer, and submitting notifications can be found by navigating to the Rule 21 section of this site. Once in the Rule 21 section, expand the “Rule 21 Non-Export Notification Only Process” menu item.
  • SCE is developing a plan to implement CAISO’s proposed immediate adjustments to Cluster 15 study schedule. Additional information will be provided when it becomes available. Please see Issue-Paper-and-Straw-Proposal-Interconnecton-Process-Enhancements-2023-Mar132023.pdf (caiso.com)
  • Please see the Wholesale Distribution Access Tariff section of this website for information regarding tariff updates effective October 30, 2019
  • CAISO’s Distributed Generation Deliverability (DGD) Process. Information and prior years’ DGD allocation results are available on our page regarding Interconnections to the CAISO. Navigate and expand the following header for additional information: CAISO’s Distributed Generation Deliverability Assignment Application Window.

 

Contact Us

Should you have any questions regarding our interconnection processes, please reach out to either the Grid Interconnection and Contract Development (GICD) team or the Net Energy Metering (NEM) / Solar Billing Plan (SBP) team: 

Grid Interconnection & Contract Development – Rule 21 Non-Export, Rule 21 Export, Wholesale Distribution Access Tariff (WDAT) and Transmission Owner Tariff (TOT)

Email: interconnectionQA@sce.com
Phone: (909) 274-1106
Mailing Address:
Grid Interconnection & Contract Development
Southern California Edison
2244 Walnut Grove Ave
Rosemead, CA 91770


Email Distribution List:
To subscribe to the GICD mailing list for notices about interconnection events, please email us.

Solar Billing Plan & Net Energy Metering – Customers who produce their own electricity through an eligible renewable distributed generation system on the Solar Billing Plan or Net Energy Metering (NEM) rate options. These rate options allow our customers to receive energy credits for the surplus electricity supplied to the electric grid.

Email: Customer.Generation@sce.com
Phone: (866) 600-6290
Mailing Address:
Southern California Edison
2244 Walnut Grove Ave
Rosemead, CA 91770


Email Distribution List:
To subscribe to the Customer Generation email list to receive notices about interconnection events and updates, please email us.

Rule 21 Ombudsman Information
To address disputes regarding Rule 21 missed timelines, please contact SCE's appointed ombudsman:

Rod Vickers, Project Manager
Email: Rule21.Ombudsman@sce.com
Phone: (714) 895-0211

 

DISCLAIMER: The guidelines in this section are provided with the intent to help SCE’s customers understand SCE’s Interconnection Procedures. However, in the case of discrepancies with SCE’s rules, such tariffs and regulations will prevail.

Quick Links & Resources

 

Generation Project Types

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