Puget Sound Energy (PSE) interconnection application

Puget Sound Energy (PSE) is an investor-owned utility serving 1,104,338 residential customers in Washington (EIA-861, 2025). Applications: PowerClerk (PSE Net Metering Interconnection Application Portal). Gridpol files Puget Sound Energy (PSE) interconnection applications for licensed installers – solar, storage and EV chargers – with single-line diagram and site plan, unlimited for $500 a month.

Get started Look up another ZIP

Process verified from Puget Sound Energy (PSE)’s official sources (see below). Review timelines (WAC 480-108) not extracted; confirm on first project.

Puget Sound Energy (PSE) at a glance

Utility

Puget Sound Energy Inc (Puget Energy)

Type

Investor-owned utility

EIA utility ID

15500

Residential customers

1,104,338 (EIA-861, 2025)

Net-metered residential customers

26,979 (EIA-861, 2025)

Service territory

8 counties in Washington

How to apply

PowerClerk – PSE Net Metering Interconnection Application Portal · official link

Who submits

Installer (PSE Recommended Energy Professional or other contractor) typically leads the process for the customer; Interconnection Customer is party to the agreement.

Export compensation

NEM – Schedule 150 Net Metering
Excess generation credited and banked; banked credits expire March 31 each year per state law. Not combinable with TOU Schedules 307/327 or non-communicating meter Schedule 171.

Documents Puget Sound Energy (PSE) asks for

Interconnection application formElectronic Application in PowerClerk (Schedule 150 process for UL 1741 SB inverter systems <=100 kW AC incl. batteries); paper Attachment B (Tier 1) / C (Tier 2-3) otherwise Gridpol prepares this.
Single-line diagram (one-line)System schematic per PSE System Diagram Guide; must be approved before installation Gridpol prepares this.
UL 1741 / IEEE 1547 certificationUL 1741 (SB for electronic process) inverter
Interconnection agreementTier 1 Interconnection Agreement (Attachment I) / Tier 2-3 (Attachment J)
Final inspection sign-offNotice of Completion / Certificate of Completion (completed in portal) after electrical permit finaled

How the Puget Sound Energy (PSE) process runs

Select installer
Submit interconnection application in PowerClerk
PSE review; Approval to Construct (applications and schematics must be approved before installation)
Install per local codes and permits
Submit Notice of Completion after electrical permit is finalized
PSE inspects/tests and installs required meters
PSE issues approval to energize and starts net metering

Fees

Fee	Applies to	Note
$0	Net metering 0-100 kW with UL 1741 inverter via electronic process	Schedule 152 6.c
$100	0-25 kW not net metered
$500	>25-500 kW not qualified for Schedule 150
$1,000	>500 kW - 20 MW
$300	Pre-application site assessment

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
Tier 1	25 kW	UL 1741 inverter, single-phase, secondary voltage, no upgrades, 15% line-section screen
Tier 2	500 kW	<=38 kV distribution
Tier 3	20000 kW
Net metering cap	100 kW

Interconnected capacity includes aggregated nameplate plus energy storage capacity (Schedule 152, WAC 480-108).

Storage, EV and stamps

Battery storage

Batteries count toward interconnected capacity; electronic process allowed when combined generation + batteries <= 100 kW AC with UL 1741 SB inverters. Storage-only systems operating in parallel are not covered by the net metering process (Distributed Renewables / Energy Advisor).

Sources

PSE Customer Connected Solar / Net Metering: https://www.pse.com/en/green-options/Renewable-Energy-Programs/customer-connected-solar (retrieved 2026-11-13)
PSE Schedule 152 Interconnection with Electric Generators (eff. 2026-09-01): https://www.pse.com/-/media/Project/PSE/Portal/Rate-documents/Electric/elec_sch_152.pdf (retrieved 2026-11-13)

Other utilities in Washington

All Washington utilities →

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.