Customer Generation at SDG&E
Important Generation Interconnection Notices
CAISO Notices:
The next proposed available cluster application window for interconnection requests to the CAISO Cluster Study Process will be October 1 – October 15, 2026.
SDG&E WDAT Notices
SDG&E filed on August 11, 2026 to change the open/close dates of the WDAT Cluster Application Window to September 11 – September 25, 2026.
SDG&E Rule 21 Notices
Overview of Generation Interconnection
Any entity that seeks to interconnect a proposed generating or energy storage facility to SDG&E’s transmission system or distribution system, whether that is a homeowner, the homeowner’s energy contractor, or a third-party developer of generating/storage facilities, is considered an Interconnection Customer (IC) by SDG&E.
IC’s may find the following presentation entitled “Generation 101” helpful
Where interconnection requests are made/sent depends on several factors, including the following:
Where is the facility interconnecting?
- to SDG&E's Transmission System or
- to SDG&E's Distribution System
How does the facility owner/operator expect to be paid for the power/storage it generates?
- To SDG&E only via procurement program or Power Purchase Agreement, or
- To an independent energy buyer via Power Purchase Agreement, or
- To a participant in the California Energy Marketplace administered by the California Independent System Operator (CAISO)
If the proposed generating/storage facility is interconnecting to SDG&E’s Transmission System – selling to independent energy buyer or CAISO market, interconnection is made directly to CAISO .
If interconnecting to SDG&E’s Distribution System – Selling to SDG&E under a program or PPA
- Residential rooftop solar, solar + storage, or stand-alone storage under the Solar Billing Plan program, interconnection is made to SDG&E using the online interconnection portal.
- Non-NBT generating/storage facilities (subject to California Rule 21), either exporting or non-exporting projects, interconnection is made to SDG&E using the online interconnection portal.
If interconnecting to SDG&E’s Distribution System – Selling to independent energy buyer or CAISO market at wholesale (subject to SDG&E’s Wholesale Distribution Access Tariff, or WDAT), interconnection is made to SDG&E using the online interconnection portal.
For Detailed Information on Interconnection Rules/Procedures
Please use the following links to further explore interconnection rules and tariffs:
CASIO Interconnection Procedures
Solar Billing Plan Tariff Procedures
Rule 21 Interconnection Procedures
WDAT Interconnection Procedures
SDG&E Wholesale Distribution Access Tariff (WDAT) Information and Interconnection Procedures
Other important interconnection-related information
SDG&E WDAT Interconnection Queue
SDG&E Combined WDAT and Rule 21 Interconnection Queue
SDG&E Interconnection Handbook