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Connecting your own generation

We want to ensure our customers’ electrical generating equipment interconnects with our electric distribution system in a safe and reliable manner. We have interconnection tracks tailored to generator type, purpose and size.

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. You will need the following:

Net Billing: Small Distributed Generation (<200kW)

PUD’s Net Billing process is for appropriately sized facilities using fuel cells, cogeneration or renewable resources. Customers receive bill credits for energy sent to the grid, paid per kWh. For details, view the “Net Billing” Schedule in the PUD’s Electric Rate Book.

Would you like to participate in Net Billing and interconnect with the PUD’s grid? Before starting construction, please follow this process:

  1. Submit a completed Small Distributed Generation Interconnection Application and Agreement with all required documentation to interconnection@snopud.com.
  2. Your submission will be reviewed. This may take up to 2 weeks, depending on project size.
  3. If your application is acceptable, the PUD will issue an “Approval to Construct” via email for your project.  A processing fee of $85 will be assessed to the applicant’s PUD account.
  4. Once the “Approval to Construct” is received, you can proceed with installation, following all PUD installation electrical service requirements (see Section 6, Generation Interconnection, of our Electrical Service Requirements), local codes and permitting requirements. The PUD will begin the process of installing an AMI meter in preparation for net metering.
  5. Once your project installation is complete and after the electrical permit from your local jurisdiction/L&I has been finalized, submit the Notice of Completion to the PUD.
  6. The PUD will execute your Net Billing agreement and give the OK to turn on your system.

Parallel Interconnected Generators (>200 kW to 2 MW)

PUD’s parallel interconnection process includes:

  • PUD New Commercial Service Application – see link above
  • PUD Customer Generation Preliminary Application – see link above
  • PUD Customer Generation Final Application – see link above
  • System Impact Study and associated Agreement – see sample
  • Interconnection Facility Study and associated Agreement – see study sample
  • 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 for additional information. If you have any questions, please contact us at interconnection@snopud.com.

Interconnected generators >200 kilowatts to 2 megawatts intended to operate commercially may be eligible to participate in the PUD’s Small Renewables Program. View sample small renewables power purchase agreement.

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).

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. If you have any questions, please contact us at interconnection@snopud.com.

Parallel Interconnected Generators (>2 MW)

The interconnection process for projects >2 megawatts will be evaluated on a case-by-case basis. Please contact us at interconnection@snopud.com if this is of interest.

Modeling Data Requirements and Procedures (MOD-032)

In order to efficiently coordinate with neighboring utilities and meet NERC standard MOD-032, any interconnections with the Snohomish PUD system must meet the requirements outlined in the Modeling Data Requirements and Procedures standards. These standards outline what components of customer projects need to be modeled and how Snohomish PUD uses these models to coordinate with a variety of entities.