SUNEL

What SUNEL does

SUNEL Group is a privately held Greek-headquartered renewable energy company founded in 2006 that delivers integrated utility-scale solar PV solutions across the full project lifecycle. Its service portfolio spans project development support (feasibility, permitting, PPA negotiation, interconnection studies), engineering, procurement and construction (EPC), project and structured financing, operations and maintenance with 24/7 cloud-based ERP-based monitoring, battery energy storage system (BESS) integration, and energy efficiency services. Technical execution rests on in-house engineering capabilities covering PV plant layout, energy modeling, structural design, AC/DC arc flash calculations, load flow studies, medium-voltage collection system design, and substation layout.

The company generates revenue through three primary streams: one-time EPC contracts (e.g., the €303.4 million OMV Petrom Romania award for 466 MWp), co-development and project financing arrangements where SUNEL absorbs early-stage development risk in exchange for equity or developer returns, and recurring O&M and asset management fees tied to the installed base. Distribution is direct enterprise sales to international asset managers, IPPs, and developers (Luxcara, Cero Generation, Lightsource bp, Sonnedix, OMV Petrom, Horus Capital, Voltalia), supplemented by the Ameresco SUNEL Energy SA joint venture with NYSE-listed Ameresco Inc. for large-scale European project delivery.

SUNEL operates regional offices in Athens, London, Valencia, Milan, Bucharest, and Tashkent, has executed more than 2 GW across 500+ projects in 11 countries on four continents, and employs over 400 staff. The company is controlled by its Greek founders — CEO Konstantinos Zygouras and Chairman Miltos Zygouras — with no disclosed private equity or institutional investor ownership. The Green Alliance, launched October 2025 under Miltos Zygouras, extends the platform into sports-venue and infrastructure sustainability.

Name

SUNEL

Legal name

SUNEL Group

Website

https://sunelgroup.com

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

251–500 employees

Short description

SUNEL Group is a Greek-headquartered renewable energy company providing integrated EPC, project development, financing, O&M, and battery storage services for utility-scale solar projects across Europe and Central Asia, serving international investors, asset managers, IPPs, and industrial clients.

Ownership category

akta.pro rank

Product category

Solar EPC and Renewable Energy Services

NAICS

Solar Electric Power Generation (221114), Electric Power Generation (22111)

akta.pro primary industry

Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB)

akta.pro secondary industries

Utility-Scale PV EPC (Engineering, Procurement & Construction) (EUACAGAB), Solar PV Power Plant EPC (Utility-Scale) (EUAEAAAG), Solar Design, Engineering & Performance Software (PV Modeling, Digital Twins, Monitoring) (EUAMABAH), Solar Financing, Leasing & Ownership Platforms (Tax Equity, PPA, Securitization) (EUAMABAJ)

Keywords

• Utility-scale solar EPC
• Renewable energy project development
• Battery energy storage systems
• Solar asset management services
• Energy efficiency consulting

Headquarters

HQ city

Athens

HQ country

Greece

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. EPC Contracting: Engineering, Procurement, and Construction services for utility-scale solar PV projects. SUNEL delivers turnkey solutions from design through construction, serving as the EPC contractor for international investors and asset managers.
2. Project Development and Financing: SUNEL develops, acquires, and finances utility-scale solar PV projects, combining financial expertise with strong industry relationships to bring projects from early-stage development to financial close.
3. Operations & Maintenance and Asset Management: Long-term O&M services including 24/7 monitoring, preventive and corrective maintenance, budgeting and financial forecasting, insurance coordination, compliance reporting, and investment/divestment support for solar assets.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

SUNEL Group is a renewable energy developer and EPC contractor delivering integrated utility-scale solar PV solutions across the full project lifecycle—from feasibility, permitting, and financing, through engineering, procurement, and construction, to long-term operations, maintenance, and asset management. The company also delivers battery energy storage systems (BESS) and energy efficiency services to international investors, asset managers, IPPs, and commercial/industrial clients, with a track record of 2+ GW executed across 11 countries.

Product overview

SUNEL Group is a leading provider of integrated renewable energy solutions, offering a comprehensive portfolio of services across the solar project lifecycle. The core offerings include Engineering, Procurement, and Construction (EPC) services for utility-scale solar PV projects, complemented by financing, project development support, operations and maintenance, energy storage solutions, and energy efficiency services. The company also operates The Green Alliance, an initiative focused on sustainable energy solutions for sports venues and infrastructure. SUNEL's services span from early-stage development and feasibility studies through construction, commissioning, and long-term asset management, with a track record of developing, designing, and executing over 2 GW of solar projects worldwide.

Differentiator

Problem solved

Functional benefit

Brands

• The Green Alliance: Initiative dedicated to accelerating the energy transition of sports venues, hospitality complexes, and large-scale infrastructure. Through this platform, SUNEL collaborates with club owners, venue operators, municipalities, and infrastructure partners to deliver tailored clean energy solutions.

Products and services

• Engineering, Procurement and Construction (EPC) Services Turnkey Engineering, Procurement, and Construction (EPC) services for utility-scale solar PV projects, covering in-house engineering (PV plant layout, energy modeling, structural design, AC/DC arc flash, load flow studies, medium voltage collection system and substation design), equipment procurement from global suppliers, and self-performing construction management for safety, quality, and schedule adherence. Delivered to international investors, asset managers, IPPs, and developers.
• Project Financing Services Financial structuring, advisory, and project financing services for utility-scale solar PV projects, including development, acquisition, and financing support; leverages relationships with financial institutions to optimize tax, depreciation, and incentive structures for project owners and investors.
• Operations, Maintenance and Asset Management Long-term operations and maintenance plus asset management for solar PV plants, including 24/7 remote monitoring, cloud-based ERP platform with automated alerts and diagnostics, preventive and corrective maintenance, budgeting/financial forecasting, insurance coordination, compliance reporting, and investment/divestment support.
• Project Development Support End-to-end development services for solar energy developers and investors, covering feasibility assessments, PPA negotiation, permitting and regulatory compliance, site securing, interconnection studies, budgeting, forecasting, and risk analysis, plus co-development partnerships sharing risk and upside with project owners.
• Energy Storage Solutions (BESS) Advanced Battery Energy Storage System (BESS) solutions for grid stabilization, peak shaving, frequency regulation, and load shifting, including stand-alone storage installations and hybrid solar-plus-storage projects with custom design and engineering for storage system sizing.
• Energy Efficiency Services Comprehensive energy efficiency offerings including energy audits, system optimization, monitoring and analytics, and deployment of energy management systems to reduce consumption and operational costs for businesses, sports venues, and energy users.

Quantifiable outcome

• 2 GW+ of solar projects successfully developed, designed, and executed worldwide
• +7 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Ten partnerships are on record, tiered minor, flagship and core.

• OMNIPOL GroupminorStrategic or Co-development Partner · 21 April 2026Czech industrial and technology group with over 90 years of experience in aerospace and defence sectors. SUNEL and OMNIPOL signed an MoU to explore opportunities for clean energy collaboration under an ESCO model, evaluating solutions related to on-site energy generation, energy storage, and energy efficiency across OMNIPOL's industrial sites in Czechia.
• Basketball Champions League (BCL)flagshipGTM or Marketing Partner · 30 September 2025Ameresco SUNEL serves as Presenting Partner of Basketball Champions League Season X. This landmark partnership promotes sustainability and clean energy across European sports, combining SUNEL's renewable energy expertise with BCL's international reach. The partnership includes energy upgrade plans for sports venues and the launch of The Green Alliance initiative.
• Ameresco Inc.coreStrategic or Co-development PartnerAmeresco SUNEL Energy SA is a joint venture between Ameresco Inc. (NYSE: AMRC) and SUNEL Group, created to deliver large-scale renewable energy projects across Europe. Ameresco brings expertise in energy efficiency, distributed energy resources, and sustainability strategy. Together they have been awarded major projects including the 83 MW Kozani solar project in Greece and 466 MWp in Romania.
• LuxcaracoreStrategic or Co-development PartnerGerman energy infrastructure asset manager that awarded Ameresco SUNEL Energy SA an EPC contract for an 83 MW solar installation in Kozani, Greece. Luxcara holds the majority stake in the project and is described as a trusted partner in advancing solar investments in Greece.
• Cero GenerationcoreChannel Partner/ Reseller/ DistributorDeveloper client for the Delfini 100 MWp solar power plant in Prosotsani, Drama, Greece. The project is the first solar PV project in Greece to utilize a private Power Purchase Agreement (PPA), operating independently of government subsidies.
• Lightsource bpcoreChannel Partner/ Reseller/ DistributorInternational solar development company for which Ameresco Sunel Energy SA constructed the Enipeas 560 MWp solar project, one of Europe's largest solar projects, located in Larissa and Fthiotida, Greece.
• SonnedixcoreChannel Partner/ Reseller/ DistributorGlobal solar power producer for whom Ameresco SUNEL constructed the Aria 300 MWp solar portfolio across five UK locations (Lawns, Winkburn, Gammaton, Cowley, and Gonerby) contracted under the UK Government's Contracts for Difference scheme.
• AEK BCflagshipGTM or Marketing PartnerSUNEL serves as Platinum Sponsor of AEK BC and holds naming rights to SUNEL Arena (formerly Ano Liosia Olympic Hall). The arena is being redeveloped into a multi-dimensional destination for sports, concerts, festivals, and conferences, aiming to become Greece's first green Olympic property with zero-carbon footprint.
• OMV PetromcoreChannel Partner/ Reseller/ DistributorPartnership for €303.4 million EPC contracts for three 466 MWp solar parks in southwestern Romania. Projects will replace coal-fired power generation and support Romania's commitment to phasing out coal by 2032.
• Horus CapitalcoreChannel Partner/ Reseller/ DistributorClient for Branston (50 MWp) and Ingham (19.99 MWp) solar projects in the UK. Horus Capital is an energy investment company for whom SUNEL has delivered utility-scale solar farms.

Scale indicators6 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Cero Generation: European solar developer for which SUNEL delivered the Delfini 100 MWp project. Operates in overlapping geographies (Greece, Western Europe) as both a development customer and a competing developer in utility-scale PV plus storage.
• Lightsource bp: Global utility-scale solar developer and IPP that is both a customer of SUNEL (Enipeas 560 MWp) and a competitor for large European solar EPC and development mandates. Highly comparable in target customers, project scale, and geographic focus on European utility-scale PV.
• Sonnedix: Independent global solar power producer; SUNEL delivered the Aria 300 MWp UK portfolio for Sonnedix. Sonnedix also competes with SUNEL on utility-scale solar development and procurement of EPC services across European markets.
• Voltalia: European renewable energy developer and IPP — a named customer of SUNEL (Stavria 12 MWp project) and a competitor across Greek and wider European utility-scale solar and wind. Comparable business model combining IPP development with EPC and O&M.
• Luxcara: German energy infrastructure asset manager that awarded SUNEL the 83 MW Kozani EPC contract. Invests in and develops European utility-scale renewables, overlapping with SUNEL on the investor-side customer profile and competing for project pipeline.

Broad incumbents

• Ameresco: NYSE-listed energy infrastructure and efficiency firm that is SUNEL's JV partner in Ameresco SUNEL Energy SA. Comparable as a broad energy infrastructure player that combines solar/storage development with broader distributed energy and efficiency services, materially overlapping SUNEL's service scope.
• BayWa r.e. Global developer and EPC contractor for utility-scale solar and wind, active across Europe. Highly comparable in offerings (development, EPC, O&M) and customer profile (institutional investors and IPPs), with broader scale and geographic reach.
• Encavis: European operator of utility-scale solar and wind parks. Overlaps with SUNEL on the asset ownership/investor side of the European utility-scale renewables market and competes indirectly via its procurement of EPC services.
• RWE Renewables: Global renewable IPP with significant European solar and storage pipeline. Comparable as a large utility-scale solar developer/IPP and prospective customer or competitor for EPC, O&M, and storage services in SUNEL's European footprint.
• Iberdrola Renewables: Major integrated utility with a large renewable energy development pipeline across Europe, including solar. Competitively relevant due to in-house EPC capability, scale of utility-scale solar procurement, and overlap in several Southern European markets where SUNEL operates.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xtwitter.com/sunelgroup
• LinkedInlinkedin.com/company/sunelgroup
• Facebookfacebook.com/SunelGroup

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries1 record

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 SUNEL