Vermont interconnection applications
17 electric utilities serve Vermont (EIA-861, 2025): 1 investor-owned utility, 2 electric cooperatives, 14 municipal utilitys. Together they serve 281,720 residential customers; 9,399 residential customers were on net metering at year-end 2025.
Largest utilities in Vermont
Investor-owned utility · 227,727 residential customers · Vermont
Applications: Third-party portal – Vermont PUC ePUC (Net-Metering Registration / Application)
Interconnection process and documents →Electric cooperative · 36,019 residential customers · Vermont
Applications: Third-party portal – Vermont PUC ePUC (Net-Metering Registration / Application)
Interconnection process and documents →Municipal utility · 17,974 residential customers · Vermont
Interconnection process and documents →Electric cooperative · 12,250 customers · Vermont
Interconnection process and documents →Municipal utility · 6,297 customers · Vermont
Interconnection process and documents →Municipal utility · 4,888 customers · Vermont
Interconnection process and documents →Municipal utility · 4,798 customers · Vermont
Interconnection process and documents →Municipal utility · 4,659 customers · Vermont
Interconnection process and documents →Municipal utility · 3,871 customers · Vermont
Interconnection process and documents →Municipal utility · 3,723 customers · Vermont
Interconnection process and documents →Municipal utility · 2,188 customers · Vermont
Interconnection process and documents →Municipal utility · 1,912 customers · Vermont
Interconnection process and documents →Export compensation among the researched Vermont utilities: NEM. Rules differ by utility – see each utility page.
Vermont interconnection rule
Vermont Public Utility Commission (PUC)
Interconnection ruleVermont PUC Rule 5.500 (5.501-5.522), Interconnection Procedures for Proposed Electric Generation Resources and Energy Storage Devices – Interconnection Procedures for Proposed Electric Generation Resources and Energy Storage Devices · source
Applies toAll proposed interconnections of Projects in Vermont not subject to ISO-NE interconnection rules (5.501), i.e., all Vermont distribution utilities (Green Mountain Power, municipal utilities, Vermont Electric Cooperative, Washington Electric Cooperative, etc.).
Application formStatewide Commission Application Forms: 'Application for Interconnection of Distributed Energy Resources Not Greater Than 150 kW' and '... Greater Than 150 kW' (5.502(2),(4)).
TimelinesIncomplete-application notice within 7 days; for <= 500 kW the utility must notify interconnection issues by day 15 (export <= 15 kW) or day 31 (export 15-500 kW) after complete application (5.510). Projects passing preliminary screens must be approved in writing; projects < 150 kW may interconnect without an Interconnection Agreement unless operating restrictions are imposed; > 150 kW: executable agreement within 7 days after preliminary review. Optional pre-application report $300.
FeesNo application fee for nameplate <= 150 kW unless provided in an approved utility tariff; > 150 kW $600 (or tariff); pre-application report $300; feasibility study deposit lesser of 50% of estimate or $1,000.
Export compensationNet billing – 30 V.S.A. § 8010; Vermont PUC Rule 5.100 (eff. Mar. 1, 2024)
Net-metering systems up to 500 kW; Category I <= 15 kW (non-hydro), Category II 15-150 kW, Categories III/IV up to 500 kW (preferred sites etc.). Registration (roof-mounted up to 500 kW, ground-mounted <= 15 kW) or CPG application. Excess generation monetized at the applicable blended residential rate plus/minus siting and REC adjustors (first 10 years for positive adjustors), updated in biennial proceedings (5.127-5.128). Applies to all Vermont electric companies.
Bound: Rule 5.500 and Rule 5.100 apply statewide to all Vermont utilities including municipal utilities and cooperatives (PUC regulates all).
| Level | Up to | Criteria / review / fee |
|---|---|---|
| <= 15 kW export and <= 50 kW nameplate (5.510(C)) | 50 kW | Export capacity <= 15 kW, nameplate <= 50 kW; certified equipment (5.520), not on transmission line, aggregate export within equipment thermal ratings · Incompleteness notice 7 days; any interconnection issues must be notified by day 15 after complete application · No fee for <= 150 kW unless in approved utility tariff |
| Projects <= 500 kW nameplate (5.510(D)) | 500 kW | Export > 15 kW or nameplate > 50 kW: preliminary review screens 5.512(D) · Issues notice by day 31 after complete application (export > 15 kW to 500 kW) · No fee <= 150 kW (unless tariff); > 150 kW $600 or tariff amount |
| Projects > 500 kW (5.511) | Preliminary review, then feasibility (deposit lesser of 50% of estimate or $1,000), system impact and facilities studies (5.512-5.515) · Receipt notice 7 days · $600 or tariff; study costs |
- VT PUC Rule 5.500 (rev. 03/01/2024): https://puc.vermont.gov/sites/psbnew/files/documents/5500-interconnection-procedures-for-proposed-electric-generation-resources-and-energy-storage-devices.pdf (retrieved 2026-11-13)
- VT PUC Rule 5.100 Net-Metering (eff. Mar. 1, 2024): https://puc.vermont.gov/sites/psbnew/files/documents/rule-5.100-clean-final-11-12-2024.pdf (retrieved 2026-11-13)
- VT PUC Current Rules and General Orders: https://puc.vermont.gov/about-us/statutes-and-rules/current-rules-and-general-orders (retrieved 2026-11-13)
All 17 utilities in Vermont
- Green Mountain Power (GMP)227,727
- Vermont Electric Cooperative (VEC)36,019
- City of Burlington Electric17,974
- Washington Electric Cooperative0
- The Town of Lyndon Electric Dept0
- Town of Hardwick0
- Village of Morrisville0
- Town of Stowe0
- Village of Swanton0
- Village of Ludlow0
- Barton Village, Inc.0
- Village of Northfield0
- Village of Enosburg Falls0
- Village of Hyde Park0
- Village of Johnson0
- Village of Jacksonville0
- Village of Orleans0
Residential customers in Vermont 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.