Snohomish County Public Utility District No. 1

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Customer Service (M-F 8a-5:30p): 425-783-1000

For Solar Contractors or DIYers

Are You a Contractor?

To be listed in our directory of PUD-Registered Solar Contractors, you must:

  • Have successfully contracted/completed at least one PV installation with a Snohomish PUD customer
  • Have been in business for the past year
  • Have current insurance and licensing for all work being performed. Submit a W-9, Certificate of Insurance with Snohomish County PUD as an additional insured for both auto and general liability complete with endorsement pages and current WA state business license
  • Submit a Solar Installer Agreement and Application (see Contractor Documents at right)

What Is the Process to Interconnect with the PUD?

1 Submit an Interconnection Application and a Net Metering agreement (available at right)
2 Your project submission is reviewed – if acceptable, we will issue an Approval to Construct for your project
3 Proceed with the solar installation, following all local codes and permitting requirements
4 After your electrical permit has been finalized, submit the Notice of Completion to the PUD
5 The PUD will set new solar meters
6 The PUD will execute your Net Metering agreement


Anyone installing or assisting a customer with a PV installation will need to follow PUD guidelines for interconnection and net metering. Technical assistance can be found on this page.

Solar Meter Diagrams

Meter Diagram image (click to view)A one-line diagram should include all specified electrical design information about a proposed system, including solar modules, inverters, interconnection point, disconnect switches and meters. If batteries, subpanels, and/or other generators are part of the design, these must be noted. In order to correctly meter solar production, the metering configuration should match one of the diagrams found by clicking here.

Not sure how to prepare your one-line diagram? For a courtesy template, click here. It is not mandatory that you use this specific template.