Green Mountain Power (GMP) interconnection application

Green Mountain Power (GMP) is an investor-owned utility serving 227,727 residential customers in Vermont (EIA-861, 2025). Applications: Third-party portal (Vermont PUC ePUC (Net-Metering Registration / Application)). Gridpol files Green Mountain Power (GMP) interconnection applications for licensed installers – solar, storage and EV chargers – with single-line diagram and site plan, unlimited for $500 a month.

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Process verified from Green Mountain Power (GMP)’s official sources (see below). Document list (one-line/site plan) and fees not stated by GMP - see ePUC registration form.

Green Mountain Power (GMP) at a glance

Utility

Green Mountain Power Corp (Energir (Noverco))

Type

Investor-owned utility

EIA utility ID

7601

Residential customers

227,727 (EIA-861, 2025)

Net-metered residential customers

6,393 (EIA-861, 2025)

Service territory

13 counties in Vermont

How to apply

Third-party portal – Vermont PUC ePUC (Net-Metering Registration / Application) · official link

Who submits

Applicant (customer or representative/installer) files in ePUC; installer can be added to the case. GMP copy of Rule 5.500 application by email or mail to GMP Distributed Resources, 2152 Post Road, Rutland VT.

Export compensation

NEM – Net-Metering 2.0 (PUC Rule 5.100) - GMP Self Generation & Net Metering tariff
Blended residential rate with siting and REC adjustors; credits expire after 12 months

Review time (official)

<=15 kW: issues flagged within 15 days of registration; >15 kW: approval letter by day 15 (<=25 kW) or day 31 (larger), longer if screens fail.

Documents Green Mountain Power (GMP) asks for

Interconnection application formePUC Net-Metering Registration (<=15 kW); Rule 5.500 interconnection application for >15 kW Gridpol prepares this.
Other utility-specific document (when applicable)GMP interconnection approval letter attached to CPG filing (>15 kW)
Battery spec sheet (when applicable)Gross Solar Meter Battery Storage Install Form and checklist; GMP Solar Service with Battery Storage Requirements

How the Green Mountain Power (GMP) process runs

<=15 kW: installer/applicant files Net-Metering Registration in ePUC (acts as interconnection application); utility flags interconnection issues within 15 days.
1b. >15 kW: submit Rule 5.500 interconnection application to utility first; utility approval letter by day 15 (<=25 kW) or day 31; then file Registration/Application in ePUC with letter attached.
CPG deemed issued (conditioned on utility interconnection requirements).
Install system; request utility production/net meter.
Utility installs meter; system commissioned; credits begin.

Size levels and limits

Level	Up to	Note
Registration as interconnection application	15 kW
Rule 5.500 <=150 kW application	150 kW	approval by day 15 (<=25 kW) / day 31
Rule 5.500 >150 kW	500 kW	net metering max 500 kW; >500 kW Section 248
Net metering cap	500 kW

Registration (ePUC): roof-mounted PV <=500 kW, ground-mounted <=15 kW (guidance: ground portion up to 25 kW in mixed projects under Rule 5.105), hydro <=500 kW; Application: ground-mounted >15 kW to 500 kW.

Storage, EV and stamps

Battery storage

Battery on solar services must meet GMP 'Solar Service with Battery Storage Requirements' (DC systems e.g. Powerwall); batteries on gross solar meters need Gross Solar Meter Battery Storage Install Form.

Common issues the utility lists

Projects failing preliminary screening criteria need further analysis (timeline extended)

Gridpol’s pre-submission check covers these before we file.

Sources

GMP - Interconnecting Customer Generation: https://greenmountainpower.com/help/net-metering-project-requirements-process/ (retrieved 2026-11-13)
VT PUC - Net-Metering Registration Guidance: Amendments and FAQs: https://puc.vermont.gov/sites/psbnew/files/documents/nm-registration-guidance-070125.pdf (retrieved 2026-11-13)
VT PUC - Net-Metering: https://puc.vermont.gov/electric/net-metering (retrieved 2026-11-13)

Other utilities in Vermont

All Vermont 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.