Green Mountain Power

What Green Mountain Power does

Green Mountain Power Corporation (GMP) is a privately held, regulated electric utility headquartered in Colchester, Vermont, serving more than 275,000 residential and business customers across the state under Vermont Public Utility Commission oversight. Founded in 1893 and employing 510 people (including 275 IBEW members), GMP operates as Vermont's largest electric utility, delivering an annual energy mix that is 100% carbon free and 79% renewable, and was the first utility in the world to earn B Corp certification.

GMP's core technology platform is a 75 MW Virtual Power Plant (VPP) — the largest dispatchable power source in Vermont — that aggregates distributed home batteries (Tesla Powerwall and the newly added Enphase IQ Battery 10C), EVs, and thermal storage under approved BYOD and Energy Storage System Tariffs. The company is investing $1.5 billion through 2030 in its Zero Outages Initiative, combining undergrounding of cables, storm-hardening of lines, and energy storage deployment, financed through an approved 3.55% rate increase raising $280 million for the first two years. Complementary resilience assets include the first-in-the-nation all-renewable microgrid in Panton, mobile battery storage units, and the Hillside East at O'Brien Farm all-electric storm-resilient neighborhood.

Revenue is generated primarily through regulated electricity sales across multiple rate classes (residential Rate 1, time-of-use Rate 11/14/22, critical peak Rate 9/14, EV Rate 72/74, and large commercial/industrial Rate 63/65), supplemented by recurring revenue from battery lease programs (Enphase IQ Battery 10C at $55/month for ten years, $5,500 purchase option), EV rebate program administration through a 60+ dealer network, and a Business Innovation team that delivers free energy consultations and electrification incentives to commercial customers (King Arthur Baking, A. Johnson Lumber, Bolton Valley). All pricing is subject to Vermont PUC approval via Multi-Year Rate Plans (current MYRP ending September 2026; proposed 2026-2030 plan filed).

Name

Green Mountain Power

Legal name

Green Mountain Power Corporation

Website

https://greenmountainpower.com

Company type

Private

Founded year

1893

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Green Mountain Power Corporation is a privately held, regulated Vermont electric utility serving 275,000+ residential and business customers with 100% carbon-free electricity via a 75 MW Virtual Power Plant, $1.5 billion Zero Outages Initiative, and diversified rate classes and battery-lease programs.

Ownership category

akta.pro rank

Product category

Electric Utility Services

NAICS

Electric Power Generation, Transmission and Distribution (2211), Electric Power Generation (22111), Electric Bulk Power Transmission and Control (221121)

SIC

Electric Services (4911)

akta.pro primary industry

Green Tariffs & Utility Renewable Supply Programs (EUAGADAJ)

akta.pro secondary industries

Distributed Storage (Behind-the-Meter Batteries) (EUAMAJAE), Renewable Distributed Generation (Rooftop/Onsite Solar, Small Wind, Small Hydro) (EUACALAJ), Green Power Retailing & Bundled Supply (Energy + Certificates) (EUAGAFAE), Electrical Balance-of-Plant EPC (MV Collection, Cabling, Earthing, Lighting) (EUAEADAB)

Keywords

• Electric utility services
• Renewable energy
• Battery storage programs
• Residential electricity
• Virtual power plant

Headquarters

HQ city

Colchester

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Operations, Infrastructure, Personnel, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Electricity Sales: Regulated utility revenue from electricity distribution. Rates approved by Vermont Public Utility Commission through Multi-Year Rate Plan (MYRP). Multiple rate classes for residential, commercial, and industrial customers with various pricing structures including time-of-use and critical peak pricing.
2. Energy Storage Services: Revenue from battery lease programs (IQ Battery 10C at $55/month for 10 years), Bring Your Own Device programs, and Tesla battery service rider where customers allow GMP to control stored energy for grid benefits.
3. EV Program Rebates: Administrative fees and program management for EV rebates, charger installation incentives, and discount charging rates. Customers receive rebates; GMP manages program delivery through dealer network.

Pricing tiers

Go-to-market motion4 records

Distribution channels6 records

Marketing channels8 records

Core offering

Green Mountain Power is a regulated electric utility serving Vermont that distributes electricity to over 275,000 residential and business customers, providing 100% carbon-free energy with 79% sourced from renewables. The company also operates innovative customer programs including a home battery lease program, EV and heat pump rebates, time-of-use rates, and a 75 MW Virtual Power Plant (VPP) aggregating distributed energy resources.

Differentiator

Problem solved

Functional benefit

Products and services

• Residential Electricity Service
• Home Battery Lease Program
• EV Rebate Program
• Heat Pump Rebates
• Time-of-Use Rates
• Income-Eligible Customer Programs
• Business Innovation Program

Quantifiable outcome

• VPP reduces costs for all GMP customers by drawing stored energy during peak demand periods
• +4 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Five partnerships are on record, tiered minor and core.

• Durion, Inc.minorStrategic or Co-development Partner · 6 March 2026Vermont-based cleantech company deploying HeatTrap thermal energy storage system at a Vermont site enrolled in GMP's Flexible Load Management pilot program. HeatTrap and SunTrap technologies developed by parent company Norwich Technologies under DOE Small Business Innovation Research program.
• Enphase EnergycoreTechnology or Integration · 12 November 2025Partnership to launch home battery lease program in Vermont featuring IQ Battery 10C. Program aims to enhance grid resilience, provide backup power, and reduce costs through virtual power plant. Eligible customers can lease two IQ Battery 10C systems for $55/month supporting GMP's 75 MW VPP.
• O'Brien BrotherscoreStrategic or Co-development PartnerPartnership on Hillside East at O'Brien Farm in South Burlington - an all-electric, storm resilient neighborhood featuring battery storage that keeps residents connected through all weather while sharing energy with all GMP customers.
• TreehouseminorImplementation/ SI/ Consulting PartnerInstallation partner for EV charger installation offering $150 discount on installation and handling the connection process to make it seamless for GMP customers.
• Participating EV Dealers (60+)coreChannel Partner/ Reseller/ DistributorNetwork of over 60 Vermont EV dealers who can apply GMP rebates as discounts at point of purchase. Includes major brands: Tesla, Toyota, Chevrolet, Ford, Nissan, Hyundai, Subaru, and many others across Vermont.

Scale indicators7 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Eversource Energy: Investor-owned New England electric utility serving CT, MA, and NH with similar weather-resilience challenges and customer-experience focus. Comparable in regulated T&D operations and storm-hardening capex programs.
• Liberty Utilities (New Hampshire/Vermont): Operates as a regulated electric utility directly within Vermont and adjacent New Hampshire, overlapping GMP's service territory and customer base. Most directly comparable in scale and regulatory framework.
• Unitil Corporation: Small-cap New England regulated electric and gas utility serving NH, MA, and ME. Closest publicly traded peer in scale (~500K customers combined), New England footprint, and customer-segment mix.
• Austin Energy: Municipal utility serving Austin, TX with nationally recognized renewable portfolio leadership and innovative customer programs. Comparable as a regulated utility that has used innovation and ESG positioning as a brand and regulatory differentiator.
• Sacramento Municipal Utility District (SMUD): California municipal utility with deep renewable portfolio and customer electrification programs. Comparable in mission-driven utility positioning and pursuit of carbon-free supply, though larger and in a different regulatory environment.

Broad incumbents

• National Grid (US): Large multi-state IOU serving upstate New York and Massachusetts with regulated electric and gas distribution. Comparable in regulated T&D operations and New England weather exposure, though materially larger.
• Avangrid: Owns UI and NYSEG in New England/New York, a multi-state regulated utility with similar T&D profile and renewable integration programs. Larger and more diversified than GMP but directly comparable in regulatory model.
• Consolidated Edison: New York–based regulated utility with strong innovation investment in grid modernization and customer programs. Comparable in regulated T&D operations and resilience-focused capex, though much larger and more urban.
• Pacific Gas and Electric (PG&E): Large California IOU undergoing a multi-year transformation focused on undergrounding, wildfire mitigation, and grid resilience — the highest-profile parallel to GMP's Zero Outages Initiative, though at vastly greater scale and with different regulatory constraints.
• Xcel Energy: Multi-state regulated utility recognized as an industry leader in renewable portfolio scale and clean energy transition programs. Comparable in the strategic pairing of regulated returns with bold decarbonization investment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/greenmountainpower
• Facebookfacebook.com/GreenMountainPower
• LinkedInlinkedin.com/company/green-mountain-power
• Xx.com/greenmtnpower

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Green Mountain Power