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).

Find resources for your interconnection project


We offer resources to help you apply for, install and operate an interconnection project of any size.


Discover resources for simple solar and wind interconnection projects

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


Explore information for larger self-generation programs

Find out more about interconnecting larger solar or wind systems to the grid. The information applies to:

  • Residential and commercial rate customers installing systems that are more than 30 kW
  • Generation for agricultural and demand rate programs of any size

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 export power

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:

  • Distribution. Voltage levels generally below 60 kV, governed by the Federal Energy Regulatory Commission (FERC)

Learn more about distribution. Visit PG&E distributions qualifications

  • Transmission. Voltage levels generally of 60 kV or higher, governed by the California Independent System Operator (CAISO) Tariff

Apply to sell power to the wholesale market through our distribution system. Visit "Your Projects"

Learn more about exporting power. Visit Export Power


Find out how to request a Pre-Application Report

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).


Learn about possible system upgrade costs

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:


  • Pre-Posting Workshop: Friday, March 10, 2023
  • Unit Cost Guide Posting Date: Friday, March 31, 2023
  • Post-Update Workshop: Friday, April 14, 2023

Learn about energy storage charging

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:


  • Rule 21 SNEM - SNEM with inverter nameplate rating less than or equal to 30 kVA/kW

    This SLD is included in PG&E standard NEM2 (SNEM) Application, found on page 4 of Form 79-1151B-02 (PDF, 130 KB)
  • Rule 21 SNEM Paired Storage (AC coupled) – AC coupled SNEM Paired Storage Systems with PV inverter nameplate rating less than or equal to 30 kVA/kW and Storage inverter less than or equal to 10 kVA/kW

    This SLD is found here (PDF, 277 KB)
  • Rule 21 SNEM Paired Storage (DC coupled) - DC coupled SNEM Paired Storage Systems with inverter nameplate rating less than or equal to 30 kVA/kW and Storage less than or equal to 10 kVA/kW

    This SLD is found here (PDF, 225 KB)
  • Rule 21 Non-Export – Protection Option 3 – Storage Systems with inverter nameplate rating less than or equal to 10 kVA/kW

    This SLD is found here (PDF, 236 KB)
  • Rule 21 Non-Export – Protection Option 6 – Storage Systems with inverter nameplate rating less than or equal to 10 kVA/kW

    This SLD is found here (PDF, 209 KB)

Quarterly Substation Updates


New Notification-Only Process Pilot Program for Certain Small Non-Export Projects

For more information, download the Guidance Language for Notification Only Pilot Program (PDF, 181 KB)


Inquiries regarding existing and new interconnection projects


Equal to or less than 30kW:
SNEM: email NEMFollowups@pge.com
SNEM-PS: email SNEMPairedStorage@pge.com
SNEMA and SNEMPS-A: email NEMAProcessing@pge.com


Greater than 30kW:
Contact your assigned EGI Account Representative or Interconnection Manager.
For concerns when applying for new interconnection projects, email Rule21Gen@pge.com.


If you are dissatisfied with the efforts of PG&E to meet the timelines of the Fast Track Review and/or Detailed Study for a valid Interconnection Requests (Rule 21, Section F1.1.d.), contact the PG&E-appointed Rule 21 Ombudsman at 916-203-6459 or Rule21Ombudsman@pge.com.


To initiate an official dispute under Section K.2. of Rule 21, submit your request to Rule21Disputes@pge.com and “cc” or send a copy to Rule21.Disputes@cpuc.ca.gov. To participate in the Expedited Dispute Resolution Process under Section K.3., please refer to Expedited Interconnection Dispute Resolution (ca.gov). If you have any questions, email Rule21Disputes@pge.com.