PLEASE NOTE: On December 15, 2022, the California Public Utilities Commission (CPUC) issued a decision to modify the state's solar program. The new Solar Billing Plan will be in effect and impact only new solar customers that submit an application after April 14th, 2023.
Here are answers to frequently asked questions (PDF, 1.0 MB).
We offer resources to help you apply for, install and operate an interconnection project of any size.
Find information on interconnecting a home or business generating system of less than or equal to 30 kilowatts (kW). With our resources, you can explore Interconnections for Standard Net Energy Metering (SNEM) and apply using our online tool. Visit Standard Net Energy Metering (NEM) Interconnections
Find out more about interconnecting larger solar or wind systems to the grid. The information applies to:
Learn more about larger self-generation programs. Visit Larger Self-Generation Programs
Apply for Expanded NEM projects that are over 30 kW to 1 MW. Visit Interconnection Application for Non-Export or Certain Net Energy Metered Generating Facilities
Find out how to sell excess power directly to us or on the open market through our distribution or transmission network. Following are the types of power sales:
Learn more about distribution. Visit PG&E distributions qualifications
Apply to sell power to the wholesale market through our distribution system. Visit "Your Projects"
Learn more about exporting power. Visit Export Power
Learn about the Pre-Application Report and how to obtain certain Distribution System information about your planned interconnection point prior to submitting an Interconnection Application. For more information, download the Pre-Application Report Request guide (PDF, 126 KB).
Find out about unit costs for system upgrades that may be needed for generator interconnection. Example projects are provided to show how these unit costs are applied. For more information, download PG&E's Unit Cost Guide (PDF, 315 KB).
PG&E scheduled joint utilities workshops to discuss updates to the Unit Cost Guide on:
Find out how PG&E addresses energy storage devices charging from the grid. Since energy storage charges and discharges energy, both aspects need to be addressed for safe and reliable interconnection. For more information, download PG&E's Guide to Energy Storage Charging Issues for Rule 21 Generator Interconnection (PDF, 657 KB).
Standard Single Line Diagrams
PG&E has standard single line diagrams (SLDs) available to help speed you through the application process in many cases. These are provided here for your reference, but if these work for your project, they are also included and available for selection in the application portal during the application process.
The standard SLDs include the following:
For more information, download the Guidance Language for Notification Only Pilot Program (PDF, 181 KB)
If you have complaints about your interconnection project and are unable to resolve it with your Interconnection Manager, you can reach out to PG&E's appointed Rule 21 Ombudsman, Michael Mulvey at 916-203-6459 or via email at Rule21Ombudsman@pge.com.
To understand interconnection rules and guidelines, view the PG&E’s Rule 21 Tariff (PDF, 19.4 MB).