These European energy technology companies are primarily large and mid-sized firms, many of which specialize in renewable energy and sustainable solutions. Companies like Enpal, founded in 2017, provide solar panels and smart energy management, while KK Group, established in 1981, focuses on electrical systems for wind turbines. Other prominent firms include INNIO Group, offering power generation and compression solutions, and Equans Nederland, a global leader in technical services. CRC Evans provides welding and coating services for the energy sector, and ASTA, founded in 1814, produces high-quality copper components for high-voltage industries.
The data shows a strong emphasis on addressing the energy transition, with many companies involved in renewable energy infrastructure, energy efficiency, and smart grid technologies. There is a notable presence of companies with a long history, such as FGH GmbH (founded 1921) and ASTA, alongside more recent entrants like Enpal, indicating a blend of established expertise and newer innovations within the sector.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 5,696 | ||||
| 2 | 3,758 | ||||
| 3 |
INNIO Groupinnio.com
Provides innovative power generation and compression solutions with AI digital platform, supporting sustainable energy management and transition globally. |
2,781 | |||
| 4 |
Equans Nederlandequans.nl
A global leader in technical services, part of the Bouygues Group Helping customers accelerate the energy, digital, and industrial transitions with 6,000 employees in the Netherlands |
2,776 | |||
| 5 |
KK Groupkkgroup.com
A greentech company specializing in electrical systems for wind turbines, offering development, manufacturing, installation, and maintenance services globally |
2,495 | |||
| 6 | 1,673 | ||||
| 7 |
Equans Switzerlandequans.ch
Leading provider in Switzerland for Energy Services, Facility Management, and Building Technology Offering high-quality solutions to reduce energy consumption and improve efficiency for various sectors |
1,572 | |||
| 8 |
Clarke Energyclarke-energy.com
Specializes in energy efficient, low carbon and flexible energy systems, delivering projects with gas engines, biogas upgraders, battery storage, and more globally |
1,374 | |||
| 9 |
Proservproserv.com
Specializing in energy technology solutions, our company offers innovative, flexible, and environmentally-friendly controls, monitoring, intelligence, and optimization services for the energy sector |
1,305 | |||
| 10 |
CRC Evanscrcevans.com
CRC Evans offers welding and coating services, technologies, and solutions for the energy and infrastructure industries on a global scale |
1,066 | |||
| 11 |
Petrotec Grouppetrotec.com
A group of private companies specializing in equipment and management systems for the oil industry, as well as smart mobility solutions globally |
693 | |||
| 12 |
Smart DCCsmartdcc.co.uk
Digitising Britain's energy infrastructure through a secure wireless network connecting smart meters to energy suppliers and operators for efficiency. |
684 | |||
| 13 |
ASTAastagroup.com
A global leader in producing high-quality copper components for high-voltage industries, energy transition, and sustainability, with a focus on innovation and circular economy concepts |
628 | |||
| 14 |
ÚJV Řež, a. s. (Nuclear Research Institute Rez plc)ujv.cz
Specializing in safe energy solutions, ÚJV Řež offers technical services, research, and infrastructure for nuclear energy, industry, and medicine through its subsidiaries |
460 | |||
| 15 |
Podpodenergy.com
Leading provider of electric vehicle charging solutions for homes, public spaces, and workplaces, making clean energy easy, affordable, and accessible. |
453 | |||
| 16 |
EA Technologyeatechnology.com
Global provider of power engineering solutions, specializing in asset management and smart grid solutions for energy, utilities, and infrastructure sectors |
367 | |||
| 17 |
Camlin Groupcamlingroup.com
A provider of innovative monitoring products and services improving safety, efficiency, resilience, and sustainability of electricity and rail networks |
366 | |||
| 18 | 349 | ||||
| 19 |
Diggia Groupdiggia.com
Dedicated to promoting a transition to clean and renewable energies, offering innovative solutions for a sustainable economy and reducing greenhouse gas emissions |
294 | |||
| 20 |
James Fisher Energyjames-fisher.com
International supplier of marine back deck, subsea equipment, and engineering services for global subsea contractors in decommissioning, construction, inspection, repair, and maintenance projects |
213 | |||
| 21 | 210 | ||||
| 22 | 186 | ||||
| 23 |
ConverterTecconvertertec.com
Specializing in wind turbine converter systems, the company provides technical design, aftermarket support, build-to-print solutions, spare parts supply, maintenance, and condition monitoring systems worldwide |
167 | |||
| 24 | 158 | ||||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 25 |
Volvo Energyvolvoenergy.com
Provides battery energy storage systems to optimize energy costs, improve operational resilience, and supply reliable renewable power for sustainable customer industrial operations. |
158 | |||
| 26 |
Turbo Power Systems (TPS)turbopowersystems.com
Designs, manufactures, and develops advanced power electronics solutions including EV charging, grid resilience technologies, and high-performance motors and drives for transport, energy, and industrial sectors. |
141 | |||
| 27 |
Nyoboltnyobolt.com
Innovative battery technology company using new materials and software for ultra fast charging, high power solutions with safety and efficiency |
128 | |||
| 28 |
InstaGroup Ltdinstagroup.co.uk
A UK leader in energy efficiency and acoustics, providing sustainable products and services for both domestic and commercial sectors Aimed at contributing to the worldwide mission to Net Zero |
115 | |||
| 29 | 104 | ||||
| 30 |
Echandiaechandia.com
This company provides safe and durable electrification solutions for the marine industry, specializing in electric propulsion and onboard support systems |
96 | |||
| 31 |
Comwattcomwatt.com
Develops unique, patented technologies and smart energy management products for photovoltaic self-consumption, reducing energy bills and promoting local, green electricity production. |
92 | |||
| 32 |
Energy Driveenergydrivesystems.com
Energy Drive specializes in providing sustainable energy solutions for energy-intensive industries globally, reducing energy consumption through innovative technology and long-term partnerships |
76 | |||
| 33 |
Evolt Chargingevoltcharging.co.uk
Leading provider of electric vehicle charging infrastructure, supporting the UK's transition to sustainable mobility with comprehensive solutions, including hardware, software, and maintenance. |
72 | |||
| 34 |
EZO EV Chargingeasygo.ie
Building a connected EV community, providing access to a growing network of public charge points through a mobile app for sustainable electric travel. |
72 | |||
| 35 |
METROLOG Sp. z o.o.metrolog.com.pl
A leading producer of compact heat supply units in Poland, specializing in complex thermal energy projects and water treatment systems with a focus on energy efficiency and environmental sustainability Operating in multiple European markets |
60 | |||
| 36 |
Calogenacalogena.com
Calogena offers a solution to decarbonize European urban heating networks with a small modular nuclear reactor for residential and office buildings |
56 | |||
| 37 |
eserveserv-int.com
The company revolutionizes industrial process plants with advanced computer vision technology, enhancing efficiency, precision, and safety while eliminating in-person visits |
53 | |||
| 38 |
Enerblu Cogeneration srlenerblu.com
Designs and builds cogenerators from 50 kWe to 4 MW running on natural gas, LPG, or biogas, offering tailored solutions for energy savings and efficient systems |
49 | |||
| 39 |
Enovatesenovates.com
A leading developer and integrator of charging equipment and software platforms, with a strong presence in multiple European countries and expanding into new markets |
41 | |||
| 40 |
Noova Energy Systemsnoova.no
A technology company helping Norwegian and Swedish businesses improve efficiency, sustainability, and profitability by reducing energy consumption up to 55% |
40 | |||
| 41 |
measurable.energymeasurable.energy
This company uses machine learning to optimize plug sockets, reducing energy waste, minimizing carbon emissions, and lowering electricity costs for users |
37 | |||
| 42 |
The EV Networktheevnetwork.com
Develops, funds, builds, and owns ultrafast EV charging hubs across the UK, Europe, and USA, providing infrastructure as a service for landlords, operators, and fleets. |
31 | |||
| 43 | 25 | ||||
| 44 |
WALL-Ewall-e.works
Provides comprehensive charging and energy solutions, covering all aspects of power delivery for various applications. All-encompassing charging. |
20 | |||
| 45 |
ZynQ 360zynq360.com
ZynQ 360 provides a secure visualization software to create digital twins of assets, centralize operations, streamline planning, and reduce risk and costs |
17 | |||
| 46 |
Powernautpowernaut.io
Simplifying and optimizing decentralized energy usage to benefit all stakeholders |
16 | |||
| 47 |
AGRIDa-grid.com
AGRID develops advanced algorithms to automate building operations, reduce carbon impact, and achieve immediate savings without the need for sensors or on-site interventions |
10 | |||
| 48 |
Project Enkiprojectenki.com
Building AI datacenters at sea next to offshore wind farms, utilizing wasted wind power for sustainable, fast, and sovereign AI infrastructure. |
8 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 15, 2026.
More company lists in Europe
- The largest companies in Europe 213,521
- Multinational companies in Europe 42,021
- Companies with in-house R&D in Europe 20,166
- Retail chains in Europe 19,259
- Manufacturers in Europe 18,152
- Professional services firms in Europe 13,696
- SaaS companies in Europe 13,682
- Software Development companies in Europe 12,949
- Financial services firms in Europe 12,940
- IT Services and IT Consulting companies in Europe 11,705
- IT services companies in Europe 11,376
- Hardware manufacturers in Europe 10,563
- Family-owned companies in Europe 9,878
- Critical infrastructure operators in Europe 9,814
- Financial Services companies in Europe 9,478
- Consulting firms in Europe 8,899
- Public sector organisations in Europe 8,563
- Education providers in Europe 7,925
- Companies with a mobile app in Europe 7,898
- Distributors and wholesalers in Europe 7,574
- Retail companies in Europe 6,240
- Healthcare providers in Europe 6,132
- E-commerce companies in Europe 5,865
- Hotel and hospitality groups in Europe 5,739