Puget Sound Energy

Washington Utility Interconnection & net metering rules

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Net Metering AllowedYes
NEM TypeAnnual
Line Taps AllowedYes
Load Taps AllowedYes
AC Disconnect RequiredYes

Net metering & export

Net Metering Allowed
Yes
NEM Type
Annual
Post Solar Billing Method
Net Metering
Net Excess Generation Notes

If excess energy generated by the Net Metering System during a billing period exceeds the electricity supplied by the Company during the same billing period, the Customer-Generator will be credited for the excess kilowatt-hours generated during the billing period, making the kilowatt-hours available to offset electricity consumption during following bill periods.

Rebates Offered
No
Deregulated
No

Interconnection & taps

Approval Req To Install
Yes
Line Taps Allowed
Yes
Load Taps Allowed
Yes
Automatic Transformer Upgrade Size
0
Meter Aggregation Allowed
Yes

System size & offset

System Size Restrictions
25
System Size Restriction Type
AC kW
System Size Battery Included
No
System Size Includes Existing Systems
No
Offset Type
Combination
Offset Value
100
Offset Calculation Basis
Historical
Offset Calculation Period
12
Industry Standard Watts Sqft
2
Offset Calc Tool
Historical Usage

Metering & disconnect

Production Meter Required
No
Production Meter Criteria
  • Production meters are optional (only if a customer request one to view system production and total home energy use)
  • If the customer opts for a production meter, it will need to be a single production meter, co-located with the net meter. No production meters for DC coupled battery backup systems or systems tied into sub panels on remote parts of the property.
Production Meter Position
N/A
Production Meter Labeling
N/A
AC Disconnect Required
Yes
AC Disconnect Labeling
Visible Lockable Labeled Disconnect
Allowed Meter Adapter
None

Plans & docs

Site Plan Reqs

Not Required for Interconnection submittal

SLD Reqs

INCLUDE NOTE ON SLD NEAR METER ILLISTRATION INCLUDING

  • METER NUMBER (EXAMPLE X123456789)
  • RATING (CL200/320)
  • IF METER CAN IS CT RATED (CT RATED METER CAN)
Electric Service Reqs

Disconnect must be a single switch that isolates the entire system

Install Reqs

For projects with battery, please leave the system ON after system commissioning. Failure to do so will cause a failed utility inspection.

Placards
  • Meter enclosures shall be labeled with permanently affixed signage at the net metering enclosure to identify their function (i.e: net meter)
  • Where metering is accomplished at different voltages, the signage must also identify the voltages at which the meters are energized.
  • Labels shall confirm to the requirements of NEC Article 690.
  • All labeling should be capitalized. PSE requires engraved phenolic nameplates or adhesive die-cute labels at least 1 inch high, with raised or cut-out lettering that is a minimum of 3/8 inch high.
Equipment Approvals
California Energy Commission
Meter Num Req SLD 3LD
Yes
ESID Num Req SLD 3LD
No
Site Plan Notes

If current service is CT rated, include the CT enclosure on the schematic and site plan and include “Net Meter - Form 9S, CL20 13 terminal” at the Net Meter. Please also provide a photograph of of CT enclosure.

Electrical Diagram Notes

INCLUDE NOTE ON SLD NEAR METER

  • METER NUMBER (EXAMPLE X123456789)
  • RATING (CL200 OR 320) *FIND CORRECT RATING FROM SITE CAPTURE REPORT*

FOR PROJECTS EQUIPED WITH A CT RATED METER

  • INCLUDE NOTE ON SLD NEXT TO UM "CT RATED METER CAN"
  • ALL ELECTRICAL EQUIPMENT SHALL BE ILLISTRATED ON THE DIAGRAM (CT CAN, SERVICE METER, ALL PANELBOARDS)
  • LOCKABLE AC DISCONNECT SHALL BE LOCATED WITHIN LINE OF SITE TO THE METER
Rate Schedule Link
link
Website
link

Other details

Revision Required
Yes
Mod Swap Requires Planset
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with Puget Sound Energy before you rely on this. The useful move: if an installer says you need a main panel upgrade, ask how these tap and interconnection policies were considered first.