Wyoming interconnection applications
36 electric utilities serve Wyoming (EIA-861, 2025): 5 investor-owned utilitys, 17 electric cooperatives, 12 municipal utilitys, 1 federal power agency, 1 public power district. Together they serve 252,394 residential customers; 3,547 residential customers were on net metering at year-end 2025.
Largest utilities in Wyoming
Investor-owned utility · 1,867,246 residential customers · Wyoming
Applications: PowerClerk – PacifiCorp Net Metering / Customer Generation PowerClerk (all six states)
Interconnection process and documents →Investor-owned utility · 44,072 residential customers · Wyoming
Applications: PDF + mail – Net Metering Service Under 25 kW packet - application returned to Black Hills Energy office in Cheyenne (2016 packet, search-index text)
Interconnection process and documents →Electric cooperative · 24,835 residential customers · Wyoming
Interconnection process and documents →Electric cooperative · 15,599 residential customers · Wyoming
Interconnection process and documents →Investor-owned utility · 120,678 residential customers · Wyoming
Interconnection process and documents →Municipal utility · 14,134 residential customers · Wyoming
Interconnection process and documents →Electric cooperative · 12,868 residential customers · Wyoming
Interconnection process and documents →Electric cooperative · 8,138 residential customers · Wyoming
Interconnection process and documents →Investor-owned utility · 69,800 residential customers · Wyoming
Interconnection process and documents →Electric cooperative · 24,177 residential customers · Wyoming
Interconnection process and documents →Electric cooperative · 17,824 residential customers · Wyoming
Interconnection process and documents →Investor-owned utility · 334,012 residential customers · Wyoming
Applications: PDF + email – Level 1 Small Generator Facility Interconnection Request to Interconnection Department (hand delivery, mail or e-mail)
Interconnection process and documents →Export compensation among the researched Wyoming utilities: Net billing, NEM. Rules differ by utility – see each utility page.
Wyoming interconnection rule
Statute verified. Whether the WY PSC has adopted separate interconnection rules/standard forms (and insurance rules) not verified; utility tariffs (e.g., Rocky Mountain Power WY Schedule 135/Rule) not reviewed. Web search budget exhausted in this run.
Wyoming Public Service Commission (PSC)
Interconnection ruleW.S. 37-16-104 (safety and performance requirements for net metering systems); no comprehensive PSC small-generator interconnection rule identified in this pass – Net Metering (W.S. 37-16-101 to 37-16-104) · source
Applies toElectric utilities: electrical companies (IOUs such as Rocky Mountain Power, Black Hills, Cheyenne Light), irrigation districts and electric cooperatives distributing to retail customers; municipalities are excluded from 'electrical company' (W.S. 37-16-101(a)(iii),(v)).
Application formUtility-specific (no statewide form found).
FeesUtility may not charge a customer-generator fees that increase its minimum monthly charge above other customers in the same rate class (W.S. 37-16-102(a)(iii)). Customer bears facility costs and utility-required modifications (37-16-104(d)).
External disconnectRequired by statute: customer-generator provides, at its expense, lockable switching equipment capable of isolating the facility, approved by and accessible to the utility at all times (W.S. 37-16-104(b)).
Export compensationNEM – W.S. 37-16-101 to 37-16-104
Monthly net metering; excess kWh credited to following month; unused kWh credit at start of each calendar year sold to the utility at its filed avoided cost (37-16-103). Bidirectional meter offered. Must meet NEC, IEEE and UL standards; PSC may adopt additional control/testing requirements by regulation (37-16-104(e)).
Electric cooperatives and irrigation districts are bound by the net metering statute; municipal utilities are excluded and set their own policies.
| Level | Up to | Criteria / review / fee |
|---|---|---|
| Net metering system (statute) | 25 kW | Solar, wind, biomass or hydro; <= 25 kW; on customer premises; parallel operation; primarily to offset own load · No fee that raises minimum monthly charge above same-class customers (37-16-102(a)(iii)) |
- Wyoming Statutes Title 37 (Ch. 16 Net Metering): https://wyoleg.gov/statutes/compress/title37.pdf (retrieved 2026-11-13)
All 36 utilities in Wyoming
- Rocky Mountain Power (UT, ID, WY) / Pacific Power (OR, WA, CA)118,517
- Black Hills Energy (Cheyenne, Wyoming)44,072
- Lower Valley Energy Inc.23,172
- Powder River Energy Corporation15,548
- Montana-Dakota Utilities14,993
- City of Gillette14,134
- High Plains Power Inc.12,868
- High West Energy, Inc.5,692
- Black Hills Energy (Black Hills Power)2,179
- Yampa Valley Electric Association Inc.573
- Fall River Rural Electric Cooperative Inc.347
- NorthWestern Energy (Montana)299
- City of Cody0
- Beartooth Electric Cooperative, Inc.0
- Bridger Valley Electric Association, Inc.0
- Carbon Power & Light, Inc.0
- Wyrulec Company0
- Big Horn Rural Electric Company0
- Wheatland Rural Electric Association, Inc.0
- Big Horn County Electric Cooperative, Inc.0
- City of Torrington0
- City of Powell0
- Niobrara Electric Association, Inc.0
- Garland Light & Power Company0
- Southeast Electric Cooperative, Inc.0
- Town of Wheatland0
- Town of Lusk0
- City of Pine Bluffs0
- Town of Basin0
- Town of Guernsey0
- Town of Lingle0
- WAPA-- Western Area Power Administration0
- Town of Fort Laramie0
- City of Deaver0
- Willwood Light & Power Company0
- Midvale Irrigation District0
Residential customers in Wyoming per EIA-861 (2025). Customer counts = bundled + delivery-only service (EIA-861 Part A + Part D). Service territory is reported by county; a county can be served by several utilities.
$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
Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.