# List of energy companies in the Rhône department

Tamtam tracks 104 energy companies headquartered in the Rhône department. This list ranks the 30 largest by number of employees on LinkedIn, led by Sicame Group, Reel and CNR (Compagnie Nationale du Rhône). Their median headcount is 180. Half of them were founded in 1996 or later. The most common headquarters are Lyon (13), Dardilly (3) and Genas (2).

The companies listed in the Rhône department are primarily engaged in the energy sector, ranging from manufacturing and engineering to power generation and environmental services. They include both established mid-sized firms and large groups. Notable companies are Sicame Group, a world leader in electrical energy transmission and distribution accessories, and Reel, which designs complex lifting and handling systems for industries like nuclear and energy. CNR (Compagnie Nationale du Rhône) is a major producer of renewable electricity.

A common pattern among these companies is their focus on sustainable energy solutions and infrastructure. Symbio designs and mass-produces hydrogen-electric fuel cell systems, while EDF solutions solaires offers turnkey solar solutions. Groupe MAÏA supports sustainable territorial development through infrastructure and renewable energy projects. This highlights a regional emphasis on diverse energy production and related services.

🇫🇷 Rhône · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Sicame Group](https://www.tamtam.ai/c/sicame-group) (sicame-group.com)<br>World leader in production, sales of accessories and services for electrical energy transmission and distribution, safety equipment, and industrial applications. | Manufacturing | 🇫🇷 Lyon | 1,999 | 1955 |
| 2 | [Reel](https://www.tamtam.ai/c/reel) (reelinternational.com)<br>Designs, produces, and maintains complex lifting and handling systems and solutions for highly technical installations in diverse markets like aerospace, nuclear, and energy. | Industrial Machinery Manufacturing | 🇫🇷 Saint-Cyr-au-Mont-d'Or | 1,882 | 1946 |
| 3 | [CNR (Compagnie Nationale du Rhône)](https://www.tamtam.ai/c/cnr-compagnie-nationale-du-rhone) (tm.fr)<br>French leading producer of 100% renewable electricity, managing the Rhône river for hydroelectricity, navigation, irrigation, and agricultural use, supporting local development and innovation | Electric Power Generation | 🇫🇷 Lyon | 1,256 | 1934 |
| 4 | [EDF solutions solaires](https://www.tamtam.ai/c/edf-solutions-solaires) (edf-solutions-solaires.com)<br>Offers turnkey solar solutions for individuals, professionals, and communities, supporting energy transition and enabling self-production of sustainable, local, and decarbonized energy. | Solar Electric Power Generation | 🇫🇷 Limonest | 1,132 | 2007 |
| 5 | [Symbio](https://www.tamtam.ai/c/symbio-saint-fons) (symbio.one)<br>Designing and mass-producing high-performance StackPack hydrogen-electric fuel cell systems for mobility and stationary applications through specialized Gigafactory facilities in Europe and North America. | Fuel Cell Manufacturing | 🇫🇷 Saint-Fons | 539 | 2010 |
| 6 | [Groupe MAÏA](https://www.tamtam.ai/c/groupe-maia) (groupe-maia.com)<br>Diverse expertise supporting sustainable territorial development through infrastructure, renewable energy, heritage, biodiversity, and economic and tourism growth projects. | Utility System Construction | 🇫🇷 Lyon | 377 | 1908 |
| 7 | [CLIMAWATT](https://www.tamtam.ai/c/climawatt) (climawatt.com)<br>It specializes in photovoltaic energy and energy savings, offering expert guidance and support for solar energy projects and installations. | Environmental Services | 🇫🇷 Vaulx-en-Velin | 341 | 2023 |
| 8 | [Ineo Nuclear](https://www.tamtam.ai/c/ineo-nuclear) (equans.fr)<br>Support for nuclear industry players with multi-technical solutions covering new builds, retrofits, maintenance, operation, and decommissioning services. | Nuclear Electric Power Generation | 🇫🇷 Lyon | 330 |  |
| 9 | [FOSELEV AGINTIS](https://www.tamtam.ai/c/foselev-agintis) (foselev.com)<br>Specializes in piping projects for oil and gas, chemical, nuclear, power, and pharmaceutical industries, providing industrial piping solutions. | Oil and Gas | 🇫🇷 Vénissieux | 298 |  |
| 10 | [Chloride](https://www.tamtam.ai/c/chloride) (chloride.com)<br>Designing, manufacturing, servicing industrial UPS systems securing critical equipment power supply across industries worldwide. Safeguarding people and assets through innovative solutions. | Electric Power Transmission, Control, and Distribution | 🇫🇷 Chassieu | 282 | 1948 |
| 11 | [JST transformateurs](https://www.tamtam.ai/c/jst-transformateurs) (jst-transformers.com)<br>Design, manufacture, and maintain electric transformers for clients across five continents, with a focus on innovation and sustainable development. | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Lyon | 256 | 1905 |
| 12 | [ACM](https://www.tamtam.ai/c/acm-jonage) (acm-acr.fr)<br>Design and manufacture of pressure equipment for nuclear, pharmaceutical, chemical, petrochemical, and renewable energy sectors with 75 years expertise. | Industrial Machinery Manufacturing | 🇫🇷 Jonage | 219 | 1948 |
| 13 | [ACEPP](https://www.tamtam.ai/c/acepp) (acepp.com)<br>Engineering teams specializing in complex infrastructure construction, ensuring successful project completion and safe transfer to operators since 1997. | Engineering Services | 🇫🇷 Lyon | 196 | 2017 |
| 14 | [UPERGY](https://www.tamtam.ai/c/upergy) (upergy.com)<br>Manufacturing and distribution of high-quality batteries, chargers, and portable lighting solutions for industrial, professional, and retail markets through various specialized global subsidiaries. | Electrical Equipment Manufacturing | 🇫🇷 Limonest | 191 | 1996 |
| 15 | [elmy](https://www.tamtam.ai/c/elmy) (elmy.fr)<br>A green energy company investing in renewable production assets, selling green electricity for individuals, businesses, and communities to drive energy transition | Services for Renewable Energy | 🇫🇷 Lyon | 180 | 2015 |
| 16 | [Valiance l FAYAT ÉNERGIE SERVICES](https://www.tamtam.ai/c/valiance-l-fayat-energie-services) (fayat.com)<br>Specializing in energy distribution, process installations, robotics, electromechanics, and automation in the nuclear sector, with expertise in maintenance, electrical installations, and technical assistance | Electric Power Transmission, Control, and Distribution | 🇫🇷 Genas | 166 |  |
| 17 | [LS SERVICES](https://www.tamtam.ai/c/ls-services-saint-priest) (ls-services.com)<br>A specialized cooperative in energy services including water, electricity, and gas, offering energy-saving solutions through brands focusing on electric vehicle charging, LED lighting, and surface disinfection Partnered with Sun-Connect for solar panels in 2022 | Environmental Services | 🇫🇷 Saint-Priest | 163 | 1995 |
| 18 | [SUNZIL](https://www.tamtam.ai/c/sunzil) (sunzil.com)<br>Company designs, installs, operates solar power plants for professionals, communities in island, tropical zones with extreme climates, isolated sites. | Renewable Energy Power Generation | 🇫🇷 Dardilly | 157 | 1981 |
| 19 | [Valserve](https://www.tamtam.ai/c/valserve) (valserve.com)<br>Design, manufacture, and maintenance of specialized valves for nuclear reactors, military defense, and cryogenic systems involving liquefied gases like hydrogen and helium. | Industrial Machinery Manufacturing | 🇫🇷 Lyon | 149 |  |
| 20 | [mylight150](https://www.tamtam.ai/c/mylight150) (mylight150.com)<br>Provides solar panels, virtual batteries, and energy management systems to cut household electricity bills by half for a sustainable energy future. | Renewable Energy Equipment Manufacturing | 🇫🇷 Villeurbanne | 145 | 2014 |
| 21 | [ROBATEL](https://www.tamtam.ai/c/robatel) (robatel.fr)<br>Design, manufacture, and maintenance of mechanically welded equipment for nuclear industry including transport casks, hotcells, radiological protection, and waste treatment installations. | Industrial Machinery Manufacturing | 🇫🇷 Genas | 124 | 1830 |
| 22 | [Groupe SERL](https://www.tamtam.ai/c/groupe-serl) (groupe-serl.fr)<br>Develops and builds quality living spaces with residents and stakeholders to support ecological, social, and economic transitions in territories. | Architecture and Planning | 🇫🇷 Lyon | 119 | 1957 |
| 23 | [Terre et Lac Solaire](https://www.tamtam.ai/c/terre-et-lac-solaire) (terreetlac.com)<br>Independent producer designing, building, and operating ground-mounted, rooftop, parking, and floating solar installations for local authorities, companies, and farmers via rental or turnkey solutions. | Renewables & Environment | 🇫🇷 Lyon | 112 | 2009 |
| 24 | [ISOWATT](https://www.tamtam.ai/c/isowatt) (isowatt.fr)<br>A key player in energy renovation since 2007, focusing on sustainable housing transformation through solar energy, ecological insulation, and geothermal heating and cooling solutions | Services for Renewable Energy | 🇫🇷 Dardilly | 109 | 2007 |
| 25 | [SLAT](https://www.tamtam.ai/c/slat) (slat.com)<br>Design and manufacture of uninterruptible power supplies with battery integration for safety, security, building comfort, urban security, industrial automation and information systems. | Electrical Equipment Manufacturing | 🇫🇷 Champagne-au-Mont-d'Or | 97 | 1953 |
| 26 | [ITEN](https://www.tamtam.ai/c/iten) (iten.com)<br>French industrial solid-state energy storage solutions. Leader in development and production, mastering design and manufacturing for compact, powerful devices for electronic systems. | Semiconductor Manufacturing | 🇫🇷 Dardilly | 91 | 2011 |
| 27 | [Tunzini Maintenance Nucléaire](https://www.tamtam.ai/c/tunzini-maintenance-nucleaire) (tunzinimn.fr)<br>Specializing in nuclear maintenance during reactor shutdowns, conducting mechanical work, inspections, and radiological measurements Focus on continuous improvement and innovation for optimal facility availability | Nuclear Electric Power Generation | 🇫🇷 Lyon | 91 | 1984 |
| 28 | [DIMÉO Énergie](https://www.tamtam.ai/c/dimeo-energie) (dimeo-energie.fr)<br>Provides customized, turnkey solar energy solutions for businesses, including self-consumption, resale, building construction, and photovoltaic canopies across various sectors. | Solar Electric Power Generation | 🇫🇷 Bron | 85 | 2018 |
| 29 | [Elyse Energy](https://www.tamtam.ai/c/elyse-energy) (elyse.energy)<br>development, financing, construction, and operation of plants producing e-methanol and sustainable aviation fuels using CO2 capture and hydrogen electrolysis | Chemical Manufacturing | 🇫🇷 Lyon | 85 | 2020 |
| 30 | [Graphitech Nuclear](https://www.tamtam.ai/c/graphitech-nuclear) (graphitech-nuclear.com)<br>Engineering company specializing in developing remote-operation tools and machinery for decommissioning nuclear reactors with graphite technology, focusing on global projects and partnerships | Mechanical Or Industrial Engineering | 🇫🇷 Lyon | 80 | 2019 |

## 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 11, 2026.

## More company lists in the Rhône department

- [The largest companies in the Rhône department](https://www.tamtam.ai/l/largest-companies-rhone) (4,813)
- [Multinational companies in the Rhône department](https://www.tamtam.ai/l/multinational-companies-rhone) (577)
- [Companies with in-house R&D in the Rhône department](https://www.tamtam.ai/l/r-and-d-companies-rhone) (509)
- [Professional services firms in the Rhône department](https://www.tamtam.ai/l/professional-services-firms-rhone) (400)
- [Manufacturers in the Rhône department](https://www.tamtam.ai/l/manufacturers-rhone) (322)
- [Retail chains in the Rhône department](https://www.tamtam.ai/l/retail-chains-rhone) (302)
- [IT services companies in the Rhône department](https://www.tamtam.ai/l/it-services-companies-rhone) (286)
- [SaaS companies in the Rhône department](https://www.tamtam.ai/l/saas-companies-rhone) (284)
- [Software Development companies in the Rhône department](https://www.tamtam.ai/l/software-development-companies-rhone) (264)
- [IT Services and IT Consulting companies in the Rhône department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-rhone) (253)
- [Hardware manufacturers in the Rhône department](https://www.tamtam.ai/l/hardware-companies-rhone) (243)
- [Consulting firms in the Rhône department](https://www.tamtam.ai/l/consulting-firms-rhone) (242)
- [Business Consulting and Services companies in the Rhône department](https://www.tamtam.ai/l/business-consulting-and-services-companies-rhone) (219)
- [Distributors and wholesalers in the Rhône department](https://www.tamtam.ai/l/distributors-and-wholesalers-rhone) (185)
- [Higher Education companies in the Rhône department](https://www.tamtam.ai/l/higher-education-companies-rhone) (155)
- [Education providers in the Rhône department](https://www.tamtam.ai/l/education-companies-rhone) (154)
- [Law Practice companies in the Rhône department](https://www.tamtam.ai/l/law-practice-companies-rhone) (152)
- [Real Estate companies in the Rhône department](https://www.tamtam.ai/l/real-estate-companies-rhone) (151)
- [Family-owned companies in the Rhône department](https://www.tamtam.ai/l/family-owned-companies-rhone) (149)
- [Subscription businesses in the Rhône department](https://www.tamtam.ai/l/subscription-businesses-rhone) (149)
- [Construction companies in the Rhône department](https://www.tamtam.ai/l/construction-companies-rhone) (140)
- [Pharmaceutical companies in the Rhône department](https://www.tamtam.ai/l/pharmaceutical-companies-rhone) (134)
- [Financial services firms in the Rhône department](https://www.tamtam.ai/l/financial-services-firms-rhone) (132)
- [Advertising Services companies in the Rhône department](https://www.tamtam.ai/l/advertising-services-companies-rhone) (126)

## The same list elsewhere in France

- [Energy companies in France](https://www.tamtam.ai/l/energy-companies-france) (1,594)
- [Energy companies in Île-de-France](https://www.tamtam.ai/l/energy-companies-ile-de-france) (475)
- [Energy companies in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/energy-companies-auvergne-rhone-alpes) (236)
- [Energy companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/energy-companies-nouvelle-aquitaine) (173)
- [Energy companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/energy-companies-hauts-de-seine) (144)
- [Energy companies in Occitanie](https://www.tamtam.ai/l/energy-companies-occitanie) (128)
- [Energy companies in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/energy-companies-provence-alpes-cote-dazur) (124)
- [Energy companies in Grand Est](https://www.tamtam.ai/l/energy-companies-grand-est) (115)
- [Energy companies in Hauts-de-France](https://www.tamtam.ai/l/energy-companies-hauts-de-france) (74)
- [Energy companies in Pays de la Loire](https://www.tamtam.ai/l/energy-companies-pays-de-la-loire) (66)
- [Energy companies in the Gironde department](https://www.tamtam.ai/l/energy-companies-gironde) (61)
- [Energy companies in the Bouches-du-Rhône department](https://www.tamtam.ai/l/energy-companies-bouches-du-rhone) (58)
- [Energy companies in Brittany](https://www.tamtam.ai/l/energy-companies-brittany) (56)
- [Energy companies in the Haute-Garonne department](https://www.tamtam.ai/l/energy-companies-haute-garonne) (48)
- [Energy companies in the Nord department](https://www.tamtam.ai/l/energy-companies-nord) (42)
- [Energy companies in the Isère department](https://www.tamtam.ai/l/energy-companies-isere) (41)
- [Energy companies in the Loire-Atlantique department](https://www.tamtam.ai/l/energy-companies-loire-atlantique) (40)
- [Energy companies in Bourgogne-Franche-Comté](https://www.tamtam.ai/l/energy-companies-bourgogne-franche-comte) (38)
- [Energy companies in the Hérault department](https://www.tamtam.ai/l/energy-companies-herault) (38)
- [Energy companies in Normandy](https://www.tamtam.ai/l/energy-companies-normandy) (38)
- [Energy companies in the Bas-Rhin department](https://www.tamtam.ai/l/energy-companies-bas-rhin) (33)
- [Energy companies in Paris](https://www.tamtam.ai/l/energy-companies-paris) (187)
- [Energy companies in Lyon](https://www.tamtam.ai/l/energy-companies-lyon) (34)
- [Energy companies in Toulouse](https://www.tamtam.ai/l/energy-companies-toulouse) (33)

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Source: https://www.tamtam.ai/l/energy-companies-rhone