groSolar
groSolar is a US solar EPC firm (legal: Global Resource Options, Inc.) serving the 1-30 MW commercial and utility-scale market with turnkey engineering, procurement, construction, operations & maintenance, and product distribution. Specializes in environmentally sensitive sites and operates as an independently operated subsidiary of EDF Renewable Energy.
- Company typePrivate
- Founded1998
- HeadquartersWhite River Junction, United States
- Headcount51–100
- GTM typeB2B
- OfferingServices
What groSolar does
groSolar (legal entity Global Resource Options, Inc.) is a US-based solar engineering, procurement, and construction (EPC) firm serving the 1-30 MW commercial and utility-scale market, founded in 1998 in Vermont by Jeff and Dori Wolfe. The company operates as an independently operated subsidiary of EDF Renewable Energy following its April 2016 acquisition, with headquarters in White River Junction, VT and offices in Rutland, Columbia (MD), and Boston, plus distribution warehouses in Fontana, CA and Pittston, PA. Its core business is turnkey EPC services for solar PV projects, including project development, financing support, design-build, and long-term operations & maintenance, with over 2,000 installations and 150+ MW developed or under construction across its history. groSolar has developed proprietary expertise in environmentally sensitive sites — capped landfills, EPA-regulated Superfund sites, brownfields, and open-water wastewater treatment tanks — using ballasted non-penetrating racking and soil-preserving driven-post designs.
The company's revenue model rests on three streams: (1) one-time EPC construction contracts for utility, municipal, commercial, and government clients, with project sizes from 1 to 30 MW; (2) recurring operations & maintenance service contracts on installed systems; and (3) wholesale product distribution of PV modules, inverters, and racking to a network of 1,500+ dealers across North America. Customer concentration is diversified across verticals including investor-owned and municipal utilities, municipal light departments, corporate campuses, manufacturing, defense (Vermont Air National Guard), agriculture, and education. Notable customers include Green Mountain Power, Community Energy Solar, D.E. Shaw Renewable Investments, INDU Solar Holdings (Duke Energy/Integrys JV), Canadian Solar, SAS Institute, Green Mountain Coffee Roasters, and Longwood Gardens. The company also maintains deep channel partnerships with project developers who originate projects and engage groSolar as the EPC contractor.
groSolar's go-to-market is enterprise field sales — direct outreach by BD leadership, RFP responses, and developer-partner referrals — supplemented by industry conference participation, press releases, and a content resource library. The firm claims a 100% success rate on the last nine NYSERDA grant applications for clients, and has received multiple SEIA/SEPA and ACEC industry awards including a 2013 SEIA/SEPA PV Project of Distinction award for the Keystone Solar project (6 MW, the largest in Pennsylvania at completion). In March 2026, groSolar executed its first disclosed international project — a hybrid solar PV and battery storage system for IFGreen Industries in Lagos, Nigeria — signaling geographic expansion beyond the US.
groSolar firmographics
Firmographics- Name
- groSolar
- Legal name
- Global Resource Options, Inc.
- Website
- https://grosolar.com
- Company type
- Private
- Founded year
- 1998
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- groSolar is a US solar EPC firm (legal: Global Resource Options, Inc.) serving the 1-30 MW commercial and utility-scale market with turnkey engineering, procurement, construction, operations & maintenance, and product distribution. Specializes in environmentally sensitive sites and operates as an independently operated subsidiary of EDF Renewable Energy.
- Ownership category
- akta.pro rank
groSolar industry classification
Industry- Product category
- Commercial and Utility-Scale Solar EPC
- NAICS
- Power and Communication Line and Related Structures Construction (237130), Architectural, Engineering, and Related Services (5413), Engineering Services (541330)
- SIC
- Heavy Construction Other Than Bldg Const - Contractors (1600), Water, Sewer, Pipeline, Comm & Power Line Construction (1623)
- akta.pro primary industry
- Utility-Scale PV EPC (Engineering, Procurement & Construction) (EUACAGAB)
- akta.pro secondary industries
- Solar PV Power Plant EPC (Utility-Scale) (EUAEAAAG), Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB), Solar Balance-of-Plant EPC (Piles/Foundations, Trenching, Combiner Networks) (EUAEADAJ), Electrical Balance-of-Plant EPC (MV Collection, Cabling, Earthing, Lighting) (EUAEADAB), Construction Management & General Contracting (EPCM, Scheduling, QA/QC, HSE) (EUAMAFAJ), Environmental & Permitting Compliance During Construction (Erosion Control, Wildlife Mitigation, Monitoring) (EUAMAFAM)
Keywords
Where groSolar is headquartered
LocationHeadquarters
- HQ city
- White River Junction
- HQ country
- United States
- HQ region
- North America
Offices7 records
Markets served
groSolar business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- EPC (Engineering, Procurement & Construction) Services: Full turnkey EPC services for solar PV projects including development, financing support, design-build, and long-term O&M. groSolar serves as the EPC contractor on projects owned by third-party developers, utilities, and financial investors. Revenue earned through project construction contracts.
- Product Distribution & Procurement: Wholesale distribution of solar products (PV modules, inverters, racking) to contractors and resellers across North America. Volume-based purchasing from manufacturers passed on to customers at competitive prices. Revenue from product sales margins.
- Operations & Maintenance (O&M): Ongoing O&M services for solar PV system owners, ensuring systems operate at designed levels. Revenue generated through service contracts with system owners.
Go-to-market motion2 records
Distribution channels3 records
Marketing channels5 records
groSolar product offering
Product offeringCore offering
groSolar is a commercial and utility-scale solar engineering, procurement, and construction (EPC) firm that designs, builds, procures, and maintains 1–30 MW solar PV projects for utilities, municipalities, commercial and industrial customers, government entities, agriculture, and education. The firm also wholesales PV modules, inverters, and racking to contractors and resellers, and provides ongoing operations and maintenance services across the United States.
Product overview
groSolar is a commercial and utility-scale solar engineering, procurement, and construction (EPC) firm serving the 1 to 30 MW market. The company operates as a single unified service offering rather than a platform-plus-modules architecture. Its core portfolio consists of turnkey EPC services (Project Development, Design-Build, Financing, Procurement, and Operations & Maintenance) complemented by distribution/reseller services for solar equipment. The company specializes in serving diverse market segments including Industrial & Commercial, Utility Scale, Municipal & Public Sector, Environmentally Sensitive Sites (landfills/brownfields), Agriculture, and Education & Non-Profits sectors. Notable projects include the Stafford Hill Solar Farm (battery storage), large landfill solar installations (Marion County 7.1MW, Camden Solar Center 1.8MW), agricultural solar (Keystone 6MW, Longwood Gardens 1.5MW), and municipal installations (Vermont Air National Guard 1.45MW).
Differentiator
Problem solved
Functional benefit
Products and services
- Commercial & Utility Solar EPC Services (Design-Build) Turnkey engineering, procurement, and construction services for commercial and utility-scale solar PV projects ranging from 1 to 30 MW, including design-build and project management for utilities, municipalities, commercial and industrial customers, government, agriculture, and education.
- Solar Operations & Maintenance Ongoing maintenance and support services for solar PV projects to ensure they operate at designed levels, available for projects built by groSolar or by other providers.
- Solar Project Development Solar project development services including feasibility analysis, system layout, design, electricity generation projections, interconnection review, permitting, and site/construction analysis for commercial and utility-scale solar projects.
- Solar Financing Services Assistance with financial modeling and determining financial feasibility for solar PV projects, connecting clients with financing options including PPAs and grant programs.
- Solar Product Procurement Volume procurement of solar equipment including PV modules, inverters, and racking systems from top manufacturers, with logistics coordination services for groSolar's own projects and external customers.
- Contractor & Reseller Distribution Wholesale distribution of solar products including PV modules, inverters, and racking to contractors and resellers throughout North America, leveraging volume manufacturer pricing and East and West coast warehouses with same-day shipping capability.
Quantifiable outcome
- Up to 90% reduction in annual electric costs for industrial facilities (Clean Harbors case)
- +7 more outcomes
Companies that use groSolar
Customer profileNamed customers20 records
Segments6 records
Ideal customer profiles5 records
groSolar technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
groSolar partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered core and minor.
- IFGreen Industries & InvestmentcoreIFGreen Industries & Investment, an agro-allied processing company in Epe, Lagos, Nigeria, partnered with groSolar to commission a hybrid solar PV and battery energy storage system at its production facility. groSolar provided the solar system technology and installation expertise. Project financed by CleanEnergyFund of FundCo.
- Green Mountain Power (GMP)coreVermont utility for whom groSolar designed and constructed the Stafford Hill Solar Farm — a first-of-its-kind solar PV plus battery storage project covering ~10 acres of former Rutland City landfill. GMP is groSolar's key utility partner in Vermont.
- Community Energy SolarcoreCommunity Energy Solar is groSolar's primary project development partner for many of its largest projects. Developer of Sterling Solar (2.4 MW, MA), Keystone Solar (6 MW, PA), Lake County Solar (5.4 MW, IN), and others. Community Energy Solar originated the projects, structured ownership, and engaged groSolar as EPC contractor.
- Pennoni EngineeringminorEngineering consulting firm that collaborated with groSolar and Longwood Gardens on the 1.5 MW Longwood Gardens solar PV project. Pennoni developed the stormwater management model and received ACEC Diamond Award recognition for the project.
- FLS EnergyminorPartnered with groSolar and SAS Institute on SAS Solar Farm 2 (1.2 MW) in Cary, NC. FLS Energy CEO noted SAS as deploying more solar than any other company in the Southeast.
- Canadian Solar Inc.coreOne of the world's largest solar power companies and co-owner of multiple groSolar-built projects including Sterling Solar and Berkley East Solar (via INDU Solar Holdings JV with Duke Energy/Integrys). Supplier of solar modules for many groSolar projects (e.g., 20,702 Canadian Solar 290W modules for Keystone Solar).
- Duke Energy Renewables / Integrys Energy Services (INDU Solar Holdings)coreINDU Solar Holdings is a joint venture between subsidiaries of Duke Energy and Integrys Energy Services. Co-owner of multiple groSolar projects including Sterling Solar and Berkley East Solar. Duke Energy Renewables is a leading US renewable energy independent power producer.
- HelioSage EnergycoreDeveloper that selected groSolar for the Camden Solar Center project (1.8 MW over open wastewater treatment tanks). HelioSage brought together groSolar as EPC and Integrys Energy Services as project owner. Described groSolar as bringing 'high level of professionalism and competence' to the project.
- Integrys Energy ServicescoreOwner of Camden Solar Center (1.8 MW) via Integrys subsidiary. Co-owner with Duke Energy (INDU Solar Holdings JV) of Sterling Solar and Berkley East Solar projects built by groSolar. Purchased solar generated electricity from CCMUA via PPA.
- Bright Plain Renewable EnergyminorProject manager for Lake County Solar (5.4 MW) built by groSolar. Bright Plain Renewable Energy manages the project on behalf of owner D.E. Shaw Renewable Investments.
- Ecogy SolarminorOwner of the Longwood Gardens solar PV system (1.5 MW). groSolar was the EPC contractor for the project. Ecogy Solar is the project developer/owner.
Scale indicators8 records
Recent moves8 records
Expansion highlights5 records
groSolar competitors and assessment
Company assessmentBroad incumbents
- EDF Renewable Energy: Parent company of groSolar since April 2016 and itself a top US independent power producer with ~10 GW of operating renewable assets. Operates overlapping solar EPC and development capabilities, making it both parent and largest internal peer.
- First Solar: First Solar is a vertically integrated thin-film PV manufacturer and utility-scale project developer/EPC. While a different business model (vertically integrated), it competes with groSolar on utility-scale project origination and EPC execution in overlapping US markets.
Direct peers
- Swinerton Renewable Energy: Swinerton Renewable Energy is a leading utility-scale solar EPC and operations & maintenance provider. Directly competes with groSolar on commercial and utility-scale projects across the US, with broader geographic reach and larger engineering bench.
- Mortenson Construction: Mortenson's Renewable Energy Group is one of the largest US utility-scale solar EPC contractors, executing gigawatts of projects annually. Directly comparable to groSolar as a turnkey solar EPC for utility and commercial clients, though at materially larger scale.
- Borrego Solar (now ADT Solar / Causey Demgen): Borrego Solar is a US commercial and utility-scale solar EPC with comparable project size profile (sub-utility to mid-utility scale) and East Coast/West Coast operating geographies. Most direct mid-sized EPC competitor to groSolar.
- McCarthy Building Companies: McCarthy's Renewable Energy & Storage group provides utility-scale solar EPC and self-perform construction across the US. Comparable to groSolar as a turnkey EPC for commercial and utility-scale PV with growing storage integration.
Emerging players
- Pivot Energy: Pivot Energy is a US commercial and community solar developer with overlapping geographic focus on the Northeast, Midwest, and Mid-Atlantic. Comparable as an emerging competitor for community and commercial solar project origination.
- OneEnergy Renewables: Developer partner of groSolar originating commercial/utility-scale projects. Comparable as an emerging community and utility-scale solar developer that engages third-party EPCs, sometimes competing for the same customer base as groSolar.
- HelioSage Energy: Solar project developer that has engaged groSolar as EPC on projects like Camden Solar Center. Comparable as a US commercial/utility-scale solar developer using third-party EPCs; an emerging player competing for the same customer base.
Regional players
- Community Energy Solar: Mid-Atlantic-based solar developer that has originated Keystone Solar, Sterling Solar, and Lake County projects for groSolar as EPC. Comparable as a regional developer competing for commercial, university, and municipal solar offtake relationships.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
groSolar social profiles
Digital presencegroSolar financial estimates
Financial estimateRevenue estimate
Valuation estimate
groSolar leadership team
Management profileNumber of profiles
Profiles11 records
groSolar funding detail
Funding detailFunding overview
Funding rounds4 records
Investors6 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
groSolar M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about groSolar
What does groSolar do?
groSolar is a commercial and utility-scale solar engineering, procurement, and construction (EPC) firm that designs, builds, procures, and maintains 1–30 MW solar PV projects for utilities, municipalities, commercial and industrial customers, government entities, agriculture, and education. The firm also wholesales PV modules, inverters, and racking to contractors and resellers, and provides ongoing operations and maintenance services across the United States.
Is groSolar a public or private company?
groSolar is a private company. It is classified as corporate owned and is currently operating.
When was groSolar founded?
groSolar was founded in 1998. It employs 51 to 100 people.
Where is groSolar based?
groSolar is headquartered in White River Junction, United States, in the North America region.
How does groSolar make money?
Three revenue lines are on record. EPC (Engineering, Procurement & Construction) Services are the primary driver. The others are product Distribution & Procurement and operations & Maintenance (O&M).
Who are groSolar's main competitors?
Broad incumbents on record are EDF Renewable Energy and First Solar. Direct peers are Swinerton Renewable Energy, Mortenson Construction, Borrego Solar (now ADT Solar / Causey Demgen) and McCarthy Building Companies. Emerging players are Pivot Energy, OneEnergy Renewables and HelioSage Energy. Community Energy Solar is listed as a regional player.
Does groSolar have an API?
No public API is recorded for groSolar.
What industry is groSolar in?
groSolar's product category is Commercial and Utility-Scale Solar EPC. Its primary akta.pro industry code is EUACAGAB, Utility-Scale PV EPC (Engineering, Procurement & Construction), with a secondary code of EUAEAAAG, Solar PV Power Plant EPC (Utility-Scale). Its NAICS code is 237130 and its SIC code is 1600.