Snohomish County PUD interconnection application

Snohomish County PUD is a public power district serving 349,905 residential customers in Washington (EIA-861, 2025). Applications: Own online portal (Interconnection Application and Net Metering Agreement (Adobe Sign web form)). Gridpol files Snohomish County PUD interconnection applications for licensed installers – solar, storage and EV chargers – with single-line diagram and site plan, unlimited for $500 a month.

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Process verified from Snohomish County PUD’s official sources (see below).

Snohomish County PUD at a glance

Utility

PUD No 1 of Snohomish County

Type

Public power district

EIA utility ID

17470

Residential customers

349,905 (EIA-861, 2025)

Net-metered residential customers

5,189 (EIA-861, 2025)

Service territory

2 counties in Washington

How to apply

Own online portal – Interconnection Application and Net Metering Agreement (Adobe Sign web form) · official link

Who submits

Installer or DIY customer fills in the Adobe Sign application and attaches documents; on submit enters customer's email; PUD customer then initials the application and signs the Net Metering Agreement before it goes to the PUD.

Export compensation

NEM – Net metering (RCW 80.60)

Review time (official)

Allow up to 2 weeks for application processing.

Documents Snohomish County PUD asks for

Interconnection application formInterconnection Application (Adobe Sign web form) Gridpol prepares this.
Net metering / net billing agreementNet Metering Agreement signed by customer
Single-line diagram (one-line)Wiring/one-line diagram incl. existing generation at site Gridpol prepares this.
PV module spec sheetSpec sheets
UL 1741 / IEEE 1547 certificationUL certifications
Customer signatureCustomer initials application and signs NMA via Adobe Sign
Final inspection sign-offLocal jurisdiction / L&I electrical permit finaled before Notice of Completion
Other utility-specific documentNotice of Completion (Adobe Sign form) after install

How the Snohomish County PUD process runs

Submit Interconnection Application and Net Metering Agreement with documents (customer signs via Adobe Sign)
PUD review (up to 2 weeks); 'Approval to Construct' email; $85 fee to PUD account
Install per PUD ESR Section 6, codes, permits; PUD installs AMI meter if not present
Electrical permit finaled by local jurisdiction/L&I
Submit Notice of Completion
'Permission to Operate' email

Fees

Fee	Applies to	Note
$85	Net metering interconnection < 100 kW	Charged to PUD account after approval

Utility fees are paid by the installer or customer; they are not part of the Gridpol plan.

Size levels and limits

Level	Up to	Note
Standardized small net-metered	77 kW	Single-phase 120/240 V secondary, self-contained meter
Net metering	100 kW	Projects 78 kW and greater must be three-phase
Net metering cap	100 kW

Larger resources follow separate process (ESR Section 6, Form 6-1/6-2).

Storage, EV and stamps

Battery storage

Process also applies to adding/only installing a battery, including bi-directional EV chargers. Standby/backup generation and batteries in parallel must meet Standby Generation requirements (ESR Section 6).

EV chargers

Bi-directional EV chargers follow the same interconnection process as batteries.

Common issues the utility lists

Customer email entered incorrectly by installer so customer never receives signing request

Gridpol’s pre-submission check covers these before we file.

Sources

Snohomish PUD Rooftop Solar Installation & Interconnecting: https://www.snopud.com/save-energy/solar/rooftop/installation-interconnecting/ (retrieved 2026-11-13)
Snohomish PUD Interconnection Application & Net Metering Agreement Workflow: https://www.snopud.com/wp-content/uploads/2023/05/NetMeteringWorkflow.pdf (retrieved 2026-11-13)
Snohomish PUD Electrical Service Requirements Section 6 Generation Interconnection: https://esr.snopud.com/Content/6_gen/6_Gen_Int.htm (retrieved 2026-11-13)

Other utilities in Washington

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Gridpol Unlimited

$500 / month

Unlimited interconnection applications. 12-month agreement, signed online. The agreement starts the day you sign; first invoice right away, then monthly.

Unlimited interconnection applications
Single-line diagram and site plan for every application
Pre-submission check against the utility’s requirements
Homeowner e-signature link for the authorization
Filing in your utility portal accounts or by the utility’s method
Utility questions, corrections and resubmissions
Follow-up through approval, inspection and PTO
Customer list, exports, API and webhooks

Get started

Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.