Snohomish County Public Utility District No. 1

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

Generation Interconnection

We want to ensure that our customers' electrical generating equipment is interconnected with our electric distribution system in a manner that’s safe and reliable. We have several generator interconnection tracks tailored specifically to generator type, purpose and size:


Net Metering (for generators below 100 kilowatts)

Most PUD customers receive all of their electricity from the PUD. However, a few customers are able to generate electricity using environment-friendly methods. Our Net Metering Program allows these customers to "store" electricity generated in excess of their immediate needs with the PUD for use at some future time.

Click here to learn more about Net Metering options and requirements.



Standby Generation

PUD customers who wish to interconnect standby or emergency generation must adhere to the PUD’s Electrical Service Requirements before operating in parallel with the electric system. To learn more, follow the links to the right to the appropriate PUD document.


New Commercial Application for Service (Form 1097C)

Customer Generation Preliminary Application (ESR Form 6-1)

Customer Generation Final Application (ESR Form 6-2)

Electrical Service Requirements (Sect. 6)


Parallel Interconnected Generators (100 kW to 2 MW)

Distributed generation (DG) customers interconnecting commercial generators to the PUD’s electric distribution system must follow a specific process in order to be granted the authorization to operate and interconnect to the grid. Examples of parallel interconnected generators include: biogas, biomass, solar, wind and battery storage.

PUD’s parallel interconnection process includes:

  • PUD New Commercial Service Application (Form 1097C)
  • PUD Customer Generation Preliminary Application (ESR Form 6-1)
  • PUD Customer Generation Final Application (ESR Form 6-2)
  • System Impact Study and associated Agreement
  • Interconnection Facility Study and associated Agreement
  • PUD Interconnection Agreement
  • PUD facilities and distribution system upgrades
  • Generator-specific Testing and Startup Procedures
  • PUD Letter to Authorize Parallel Operation

Please review the Generation Interconnection Overview flow chart to the right for additional information. Contact Key Accounts at 425-783-8180 if you have questions.

Interconnected generators ranging from 100 kilowatts to 2 megawatts intended to operate commercially may be eligible to participate in the PUD’s Small Renewables Program. See link to the right for program information.

In addition to the PUD’s generator interconnection process for parallel generators, the Bonneville Power Administration (BPA) may also require the customer to follow the BPA Small Generator Interconnection Procedures (SGIP). See BPA link to the right.

To the extent possible, PUD staff will work with the customer to help ensure that the PUD and the BPA interconnection processes run concurrently. The estimated timeframe to complete the required process/procedures can range from 12 to 36 months, depending on project complexity. Customers are encouraged to engage with the PUD and BPA as early as possible in project planning.  Please contact PUD Key Accounts at 425-783-8180 for more information.


Generation Interconnection Overview (PDF)

Electrical Service Requirements (Sect. 6)

New Commercial Service Application (Form 1097C)

Customer Generation Preliminary Application (ESR Form 6-1)

Customer Generation Final Application (ESR Form 6-2)

System Impact Study Agreement sample (PDF)

Interconnection Facility Study Agreement sample (PDF)

Interconnection Agreement (PDF)

PUD Small Renewables Program

BPA Small Generator Interconnection Procedures


Parallel Interconnected Generators (greater than 2 MW)

The interconnection process for projects larger than 2 megawatts will be evaluated on a case-by-case basis. Please contact PUD Key Accounts (see contact info to the right) for more information.


Contact:

Key Accounts
425-783-8180
(M-F, 8am to 5pm)