# 30 leading energy companies in the Bas-Rhin department

Tamtam tracks 33 energy companies headquartered in the Bas-Rhin department. This list ranks the 30 largest by number of employees on LinkedIn, led by Socomec Group, ÉS and Hager France. Their median headcount is 54. Half of them were founded in 2010 or later. The most common headquarters are Strasbourg (12) and Entzheim (3).

The energy sector in Bas-Rhin is characterized by a mix of established industrial groups and younger companies focused on renewable energy and energy efficiency. Socomec Group, founded in 1922, specializes in electrical network management, while ÉS, established in 1899, focuses on regional energy production and distribution from local renewable sources. Hager France manufactures electrical distribution and EV charging infrastructure.

Notable companies include Groupe SIAT, which processes wood into timber and generates electricity from biomass, and DE DIETRICH THERMIQUE, providing thermal comfort solutions since 1684. Newer firms like Chargemap and Freshmile offer IT services for electric vehicle charging, and Melia, founded in 2023, produces wood pellets for heating. The region shows a strong emphasis on sustainable energy solutions and the development of related infrastructure.

🇫🇷 Bas-Rhin · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Socomec Group](https://www.tamtam.ai/c/socomec-group) (socomec.com)<br>Established in 1922, this independent industrial group specializes in ensuring the availability, control, and safety of low voltage electrical networks worldwide, generating a turnover of 725 M€ in 2022 | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Benfeld | 3,166 | 1922 |
| 2 | [ÉS](https://www.tamtam.ai/c/es-strasbourg) (es.fr)<br>Regional energy production and distribution focusing on local renewable sources and energy efficiency to support Alsace through a sustainable energy transition. | Electric Power Generation | 🇫🇷 Strasbourg | 545 | 1899 |
| 3 | [Hager France](https://www.tamtam.ai/c/hager-france) (hager.com)<br>Specializing in energy distribution and electric vehicle infrastructure management, providing tailored advice and services to meet clients' needs and requirements | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Obernai | 337 | 1955 |
| 4 | [Groupe SIAT](https://www.tamtam.ai/c/groupe-siat) (groupesiat.fr)<br>Industrial company processing wood into timber, moldings, and pellets, also generating electricity from biomass. Focuses on sustainable wood and energy activities. | Paper and Forest Product Manufacturing | 🇫🇷 Urmatt | 237 | 1818 |
| 5 | [Aterno](https://www.tamtam.ai/c/aterno) (aterno.fr)<br>Aterno specializes in manufacturing and installing electric heaters, including towel radiators, mobile heaters, and solar panels for hot water production in France | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Entzheim | 175 | 1993 |
| 6 | [Strasbourg Électricité Réseaux](https://www.tamtam.ai/c/strasbourg-electricite-reseaux) (strasbourg-electricite-reseaux.fr)<br>Distribution network manager operating fifteen thousand kilometers of power lines across four hundred municipalities, ensuring grid maintenance and development for regional clients. | Utilities | 🇫🇷 Strasbourg | 150 | 2016 |
| 7 | [Réseau GDS - Gaz de Strasbourg](https://www.tamtam.ai/c/reseau-gds-gaz-de-strasbourg) (r-gds.fr)<br>Management of natural gas distribution network serving over 110,000 customers across Strasbourg and Bas-Rhin, focusing on energy transition. | Natural Gas Distribution | 🇫🇷 Strasbourg | 145 | 2008 |
| 8 | [Melia](https://www.tamtam.ai/c/melia) (melia.green)<br>production of reliable, ecological wood pellets from hedgerow wood for heating, promoting energy independence and carbon footprint reduction | Renewable Energy Power Generation | 🇫🇷 Strasbourg | 133 | 2023 |
| 9 | [DE DIETRICH THERMIQUE](https://www.tamtam.ai/c/de-dietrich-thermique) (dedietrich-thermique.fr)<br>Providing high-performance, energy-efficient thermal comfort solutions with low environmental impact and elegant design, leveraging long-standing expertise and innovation. | Industrial Machinery Manufacturing | 🇫🇷 Mertzwiller | 117 | 1684 |
| 10 | [QUIRI](https://www.tamtam.ai/c/quiri) (quiri.com)<br>Designs and manufactures hydraulic equipment, including cylinders, dampers, power units, and gas springs, alongside shell and tube heat exchangers for various industries. | Machinery Manufacturing | 🇫🇷 Duttlenheim | 116 | 1876 |
| 11 | [Chargemap](https://www.tamtam.ai/c/chargemap) (chargemap.com)<br>Provides an app and pass for electric vehicle charging, connecting users with charging points and offering business solutions for fleet management. | IT Services and IT Consulting | 🇫🇷 Strasbourg | 105 | 2015 |
| 12 | [Freshmile](https://www.tamtam.ai/c/freshmile) (freshmile.com)<br>Electric vehicle charging operator providing a mobility solution through a platform for easy and enjoyable charging, with access to 165,000+ charging points in Europe | IT Services and IT Consulting | 🇫🇷 Strasbourg | 83 | 2010 |
| 13 | [VOLTEC SOLAR](https://www.tamtam.ai/c/voltec-solar) (voltec-solar.com)<br>Production of high-quality French photovoltaic panels using circular manufacturing methods, supporting renewable energy adoption by companies and local authorities. | Renewable Energy Semiconductor Manufacturing | 🇫🇷 Dinsheim-sur-Bruche | 72 | 2010 |
| 14 | [Lithium de France](https://www.tamtam.ai/c/lithium-de-france) (lithiumdefrance.com)<br>Provides geothermal heat for businesses, farms, and local communities, and produces geothermal lithium for battery manufacturing in France. | Renewable Energy Power Generation | 🇫🇷 Haguenau | 58 | 2020 |
| 15 | [R-CUA](https://www.tamtam.ai/c/r-cua) (r-cu.fr)<br>Regional operators specializing in energy efficiency and environmental services, focusing on low-carbon heat networks, project management, energy audits, and renewable energy development | Services for Renewable Energy | 🇫🇷 Strasbourg | 54 | 2014 |
| 16 | [EcoGreenEnergy](https://www.tamtam.ai/c/ecogreenenergy) (ecogreenenergy.fr)<br>Energy efficiency consulting and renewable energy installations provider since 2008, helping industrial companies reduce carbon footprint and improve competitiveness internationally | Engineering Services | 🇫🇷 Strasbourg | 53 | 2008 |
| 17 | [Actemium Strasbourg Process & Energie](https://www.tamtam.ai/c/actemium-strasbourg-process-and-energie) (actemium.fr)<br>Specializing in designing and building innovative and efficient installations in air treatment, steam, cold, utilities, and industrial processes for over 25 years | Industrial Machinery Manufacturing | 🇫🇷 Benfeld | 31 | 1997 |
| 18 | [TRYBA ENERGY](https://www.tamtam.ai/c/tryba-energy) (tryba-energy.com)<br>Development and investment in solar power projects across Europe and Africa, including site identification, permitting, financing, construction, and operation. | Business Consulting and Services | 🇫🇷 Mertzwiller | 31 | 2010 |
| 19 | [IHE Énergies](https://www.tamtam.ai/c/ihe-energies) (ihe-energies.fr)<br>Provide economical and ecological heating and energy solutions including heat pumps, thermodynamic water heaters, photovoltaic panels, and reversible air conditioners. | Renewable Energy Power Generation | 🇫🇷 Schweighouse-sur-Moder | 31 | 2020 |
| 20 | [Fröling France](https://www.tamtam.ai/c/froling-france) (froeling.com)<br>Specializing in efficient wood energy, the company pioneers state-of-the-art biomass heating systems in Europe, manufacturing firewood, wood chip, and pellet boilers | Machinery Manufacturing | 🇫🇷 Mundolsheim | 30 | 2006 |
| 21 | [PowerPark](https://www.tamtam.ai/c/powerpark-entzheim) (powerpark.fr)<br>Design and installation of photovoltaic carports with integrated electric vehicle charging stations for businesses to produce green energy and add value. | Services for Renewable Energy | 🇫🇷 Entzheim | 27 |  |
| 22 | [ENERGY CONCEPT](https://www.tamtam.ai/c/energy-concept) (energy-concept-pro.fr)<br>Renewable energy company based in Alsace, France, specializing in environmental solutions for a sustainable future Located at 1 rue du Marais, Betschdorf | Renewables & Environment | 🇫🇷 Betschdorf | 16 | 2011 |
| 23 | [EIFHYTEC](https://www.tamtam.ai/c/eifhytec) (eifhytec.com)<br>A European industrial company specializing in hydrogen technology for renewable energy storage, industry decarbonization, and sustainable mobility solutions | Oil and Gas | 🇫🇷 Strasbourg | 14 | 2019 |
| 24 | [Brakson](https://www.tamtam.ai/c/brakson) (brakson.com)<br>Helping society transition to more environmentally friendly energies and modes of transport | IT Services and IT Consulting | 🇫🇷 Strasbourg | 14 |  |
| 25 | [VIRIDIAN LITHIUM](https://www.tamtam.ai/c/viridian-lithium) (viridianlithium.com)<br>Industrial company building Europe's first lithium refining and conversion plant in Strasbourg to deliver battery-grade chemicals for the electric mobility supply chain. | Chemical Manufacturing | 🇫🇷 Strasbourg | 12 | 2021 |
| 26 | [Hestiom](https://www.tamtam.ai/c/hestiom) (hestiom.com)<br>Specializing in energy transition and efficiency, the group offers high-quality equipment and professional services in renewable energies and solar carport installations with vehicle charging | Renewable Energy Equipment Manufacturing | 🇫🇷 Entzheim | 8 | 1993 |
| 27 | [electric Oasis](https://www.tamtam.ai/c/electric-oasis) (electric-oasis.eu)<br>French innovative startup providing businesses with easy-to-install industrialized electric vehicle charging services for outdoor parking areas without the need for civil engineering | Business Consulting and Services | 🇫🇷 Strasbourg | 8 | 2023 |
| 28 | [JS HORIZONS](https://www.tamtam.ai/c/js-horizons) (js-horizons.fr)<br>Specializing in photovoltaic solutions, we help clients transition to sustainable energy, offering tailored renewable energy solutions from design to installation | Renewable Energy Power Generation | 🇫🇷 Hindisheim | 7 | 2024 |
| 29 | [GTeO](https://www.tamtam.ai/c/gteo) (gteo.fr)<br>French manufacturer of custom-made heat pumps, air treatment units, and dehumidifiers ranging from 8 to 80kW, offering comprehensive technical support | Renewable Energy Semiconductor Manufacturing | 🇫🇷 Rosheim | 5 | 2013 |
| 30 | [KWB France](https://www.tamtam.ai/c/kwb-france) (kwb.net)<br>Specializing in environmentally-friendly energy solutions, this company offers a range of wood boilers, solar thermal systems, and heating technologies, with a focus on quality service | Renewable Energy Semiconductor Manufacturing | 🇫🇷 Marckolsheim | 5 | 1994 |

## 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.

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