Cowlitz County Public Utility District

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

TOU Utility: No

Post Solar Billing Method: Net Metering

Net Excess Generation Notes: If the electricity generated by the customer and distributed back to the District during the billing period exceeds the electricity supplied by the District, then the customer shall be billed for the appropriate customer service charge as other customers of the District in the same rate schedule and credited for the net excess kilowatt-hours generated during the billing period, with this kilowatt-hour credit appearing on customer’s bill for the following billing period. On March 31st each year, any remaining kWh credits will be awarded to the utility without any compensation to the customer.

Rebates Offered: No

Deregulated: Yes

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: Yes

Production Meter Position: Inv-Disco-PM-POI

Production Meter Labeling: Production Meter

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: Standard

Electric Service Reqs

AC Disconnect is required and must be adjacent to the utility company meters.
Production Meter Socket Required

Placards

2020 NEC labeling is required on the plans, and installed at the site per NEC requirements. Must be posted on the meter base, disconnects and transformers informing working personnel that a PV system is operating at the premise.

Electrical Stamp Required: No

Equipment Approvals: California Energy Commission

Meter Num Req SLD 3LD: No

ESID Num Req SLD 3LD: No

Label Page Notes: 2020 NEC

Electrical Diagram Notes

Order of equipment on ELD = Inverter > Disco > PM > POI

Rate Schedule Link: link

Website: link

Phone: (360) 501-9546

Other details

Revision Required: Yes

Mod Swap Requires Planset: No