Save yourself time by following PG&E’s tips for seasoned professionals. Taking the necessary steps detailed below will help you get faster approval for the Agreement and Customer Authorization (A&A) formand Interconnection Applicationand achieve an easier path through the engineering review.


  • Never turn on the solar or renewable system before receiving permission to operate from PG&E. Doing so is against Electric Rule 21 guidelines.

Advice for the Agreement and Customer Authorization (A&A) Form

Asking your customer for a few, critical pieces of information will allow you to complete this form more quickly.

Tips for the Interconnection Application

  • For accuracy, double-check the electric service agreement ID and meter numbers using a recent customer statement.
  • Make sure the system size installed and listed on the Interconnection Application is less than or equal to the size you indicated on the A&A form.
  • Include a copy of the final building permit/inspection certificate that clearly indicates that final inspection for the solar or renewable installation has been performed.
  • Clearly identify the modules being installed using the list of California Energy Commission (CEC)-approved equipment that appears in the drop-down menu of the application using the PG&E online interconnection tool. If the equipment is not on the approved list, please specify the full make and model numbers of any equipment being installed.

Insight on the Engineering Review

Follow these tips to help avoid the need for a variance request. For more information about the engineering review process and what might necessitate additional review and/or system upgrades, see the Electric Rule 21 Engineering Decision Tree (PDF, 516 KB).

Note: A variance request may still be required after following these steps depending on your project's details.

  • Use standard equipment from the CEC List of Authorized Equipment.
  • PG&E recommends the use of Underwriter Laboratories (UL) 1741 certified inverters.
  • Make sure the point of interconnection is below the main breaker on the customer load side.
  • Check to confirm that your system is either three phase or single phase. An engineering review will be prompted by putting a three-phase system on a single-phase service, or a single-phase system greater than 20 percent of the transformer nameplate or 20 kilowatt (kW) on a three-phase service.
  • Check to confirm the project is a 240 volt-connected service. A 120 volt-connected service will require an additional engineering review.
  • Do not install more than one AC disconnect, and ensure it is no more than 10 feet from the service panel. (See AC Disconnect and Variance Logic (PDF, 481 KB)).