Energy companies

Storengy, a subsidiary of the ENGIE group, is a global leader in underground natural gas storage, operating 21 sites across France, Germany, and the United Kingdom.
In France, Storengy manages 14 natural gas storage sites, ensuring gas supply for 11 million French consumers, including households, local authorities, and businesses.

With 70 years of experience in underground asset management, Storengy is gradually adapting its facilities to accommodate 100% renewable gases such as biomethane and hydrogen. Its strong local presence enables the company to actively address environmental, economic, and social challenges in support of local communities. Storengy also provides technical services for industrial and energy storage projects, both domestically and internationally.

In the Grand Est region, Storengy holds three Exclusive Research Permits (Nancy, Est-Sélestat, and Nord-Mulhouse) and is conducting geological surveys to assess underground salt layers for potential hydrogen storage caverns. Already active in Grand Est with the Cerville and Trois-Fontaines-l’Abbaye gas storage sites, Storengy is pursuing its ambition to develop a French hydrogen sector.

GRTgaz builds, maintains, and develops the natural gas transmission network across most of France. The company plays a key role in balancing the gas system, which supplies natural gas to:

• Industrial sites directly connected to the transmission network,
• Households, local authorities, and businesses served via public distribution networks, which are fed by the transmission system.

GRTgaz’s network holds a strategic position at the heart of European gas flows, with interconnections to neighbouring countries and a maritime frontage that allows it to receive natural gas from around the world, in both gaseous and liquefied form, via French LNG terminals. In this way, GRTgaz supports France’s and Europe’s energy security while contributing to the development of an integrated, efficient, and competitive natural gas market.

With more than 32,000 km of buried pipelines, GRTgaz delivers gas to its customers with the highest standards of safety, cost-efficiency, and reliability, while respecting local activities, landscapes, and biodiversity. The energy transition is underway, and GRTgaz contributes through innovative, environmentally sensitive solutions. The company promotes the development of new gas uses and renewable energies by strengthening the synergy between electricity and gas systems.

IWB, the utility provider for energy, water, and telecommunications in the Canton of Basel-Stadt, supplies the Basel region and beyond with commitment, expertise, and reliability. It is a leading service provider in renewable energy and energy efficiency.

Lithium de France is France’s first independent operator in geothermal heat and lithium production. Founded in 2020, its mission is to accelerate the energy transition by providing heat to businesses, farmers, and local authorities, and by extracting lithium for electric vehicle batteries.

About ENGIE

ENGIE is a major player in the energy transition, with a mission to accelerate the shift towards a carbon-neutral economy. With 98,000 employees operating across 30 countries, the Group spans the entire energy value chain, from production and infrastructure to sales.

ENGIE’s activities encompass the production of renewable electricity and gas, flexibility solutions such as battery storage, and the management of gas and electricity transmission and distribution networks. The Group also develops local energy infrastructure, including heating and cooling networks, and supplies energy to households, local authorities, and businesses. Each year, ENGIE invests more than €10 billion to advance the energy transition and achieve its net-zero carbon goal by 2045.

Deutsche ErdWärme is Germany's largest private developer of geothermal systems. By 2025, the company aims to generate electricity and heat from geothermal energy at multiple sites across the Upper Rhine, delivering solutions for a successful energy and heat transition.

As a partner to local authorities and through community engagement, Deutsche ErdWärme promotes the use of local geothermal resources, supporting the development of a stable, eco-friendly electricity and heat supply. All projects are designed to be safe, technically advanced, and harmoniously integrated into the local landscape, now and for generations to come.

Specialising in deep geothermal energy, Deutsche ErdWärme plans, builds, and operates its own high-tech geothermal plants. Its strong regional presence and long-term business model drive active participation in local community life, ensuring the company acts as a responsible neighbour and contributes positively to the development of each site.

Currently, Deutsche ErdWärme's portfolio includes four projects in Graben-Neudorf, Waghäusel, Karlsruhe, and Dettenheim. A single exemplary geothermal plant, based on Germany's average annual electricity consumption (1,400 kWh per person), can supply electricity to a town of over 20,000 inhabitants, or replace more than 27 million litres of heating oil per year with sustainable heat.

The company's vision is to integrate these plants into local heat networks, alongside other renewable heat sources, serving the entire central and northern Upper Rhine region.

New member. More details coming soon.

New member. More details coming soon.

Rytec SA is an engineering consultancy firm specialising in waste-to-energy, the circular economy, and energy systems. The company takes full operational responsibility for projects and facilities developed by its engineers, from design to full-scale operation.

Rytec offers a unique combination of innovative engineering and hands-on experience in plant operation. Its core strengths lie in the development, optimisation, construction, modernisation, and operation of technical installations in the energy and waste management sectors.

Rytec fully integrates environmental and economic considerations into its customised reports and project plans. This is backed by its scientific and technical expertise in biological and thermal waste processing, energy systems, and resource efficiency.

Rytec’s engineers are committed not just to delivering not just a good solution, but the optimal solution for each client. With a strong sense of responsibility and close collaboration with clients and specialists, they bring to life innovative projects worldwide, helping to build a sustainable future.

EnBW AG is an energy provider primarily owned by the state of Baden-Württemberg and the Oberschwaben electricity utility. In 2013, the company reorganised under the motto “Energiewende. Sicher. Machen” (“Making the Energy Transition Safe”), marking a more flexible approach to accelerate Germany’s energy transition and respond quickly to market developments.

Today, EnBW supplies more than 35% of household electricity in Baden-Württemberg from renewable sources. Over 10% of its electricity generation comes from hydropower installations on the Rhine. In 1969, Germany and France agreed on joint operation of these facilities, enabling the construction of locks at Gambsheim and Iffezheim, as well as the micro-hydropower plants at Breisach and Kehl. Across the Upper Rhine—from Basel to Karlsruhe—the ten large hydropower plants now generate around 9 billion kWh of electricity per year.

EnBW also invests in electricity from other renewable sources. By the end of 2013, 126,000 photovoltaic installations had been connected to the grid, alongside six solar parks totalling 20 MWp. In Germany, EnBW operates more than 120 onshore and offshore wind turbines, with 160 additional locations in Baden-Württemberg under assessment. The company is also the state’s largest biogas producer, operating four plants that generate 142 million kWh of natural biogas.

EnBW has carried out extensive research on the safe and economical use of deep geothermal energy. The company participates in the French research project in Soultz-sous-Forêts and has operated Baden-Württemberg’s first geothermal plant in Bruchsal since 2009, with an electrical capacity of 550 kW. 

EDF is the leading industrial investor in the Grand Est region. The company invests in local decarbonised energy through low-carbon electricity production from its four nuclear plants and twelve hydroelectric plants on the Rhine, while also developing deep geothermal energy, wind power, and electricity and heat generation from biomass. This extensive production portfolio generated around 20% of France’s electricity in 2016, amounting to over 93 billion kWh of low-carbon power.

EDF employs nearly 11,000 people in the Grand Est—3,000 of whom are in Alsace—covering all electricity-related professions, from production to energy services, including electricity transmission and distribution. As a key player in the energy and digital transition, EDF supports both its own industrial activities as well as the regions and customers it serves in meeting new energy challenges and enhancing economic competitiveness.

For households, EDF develops innovative solutions and personalised digital services tailored to customer needs. Through subsidiaries such as ÉS and DALKIA, EDF co-creates energy solutions with businesses and local authorities, combining competitiveness, innovation, and customisation in areas such as local energy production, heat networks, energy efficiency, smart grids, energy storage, sustainable mobility, connected devices, lighting, and associated services. Its Franco-German R&D institute EIFER (a joint energy research centre with KIT) focuses on sustainable urban engineering, local energy concepts, and European energy outlooks.

As a builder of the future and accelerator of regional development, EDF works alongside local stakeholders to support the economy and employment, preserve biodiversity, enhance quality of life, and foster continuous innovation. This involvement actively contributes to the development and economic attractiveness of the Grand Est region.

With over 100 years of history, E-Werk Mittelbaden is a leading electricity supplier for both industrial and private customers in the Ortenau region. Deeply rooted locally, the company is increasingly focusing on renewable energy production from water, wind, and solar, harnessing the region's natural potential.

Through these efforts, E-Werk Mittelbaden makes a significant contribution to environmental and climate protection, reducing reliance on fossil fuels. The company employs nearly 300 staff and trains 25 apprentices in commercial roles and as electronics technicians specialising in energy and building technology.

New member! More details coming soon.

Biopower Nordwestschweiz AG generates renewable energy from the fermentation of organic waste through its own industrial and agricultural facilities in north-western Switzerland.

The company is committed to maximising the use of locally produced organic waste in its facilities. Biopower plans, finances, and builds its industrial facilities in collaboration with partners. It either operates the facilities itself or entrusts their management to a partner operator.

The renewable energy produced by Biopower is mainly bought by its shareholders. The company also coordinates the activities of its facilities’ various managers and operators.

Biopower works closely with its partners to procure and repurpose organic waste, offering municipalities logistical solutions to enable its use. Beyond north-west Switzerland, Biopower serves as a centre of expertise in biomass utilisation through fermentation.

EnergieSüdwest is not only dedicated to supporting the energy transition but also actively promotes its progress. The company is the main regional provider of water and energy in Landau and the surrounding area, with operations spanning electricity, natural gas, water and heat.

Today, EnergieSüdwest generates as much green electricity in its own facilities as it supplies to households, with photovoltaics and wind power as its flagship technologies. Its partners include municipal utilities (Stadtwerke) and local authorities. The Landau-based company also encourages the use of decommissioned oil wells to produce heat. Beyond energy, EnergieSüdwest is committed to social, ecological, and sporting projects across the region. 

Founded on 31 December 2007, GRDF is the main public natural gas distribution network operator in France. With a legacy of 60 years through its predecessor, Gaz de France, GRDF plays a strategic role in the energy market, serving suppliers, industry partners, local authorities, and customers.

GRDF’s vision and values guide its daily operations: proximity, safety, independence, impartiality, service excellence, and the pride of a job well done. These principles are shared by all employees.

Our ambition:

To be the gas energy specialist in the energy transition, a trusted partner for clients, suppliers, professional networks, and territories.

To provide exemplary public service, ensuring high-quality customer service and safe network operations.

To be recognised nationally and internationally for performance, innovation, and high standards.

To be an attractive employer with a strong societal role.

Key Figures:

Europe’s longest natural gas network

• 197,928 km of natural gas pipelines, almost five times the circumference of the Earth!
• 277 TWh of natural gas transported
• €747 million invested in network maintenance and operation
• €1 million spent daily to ensure network safety

Energy serving the territories

• 10.9 million customers across France
• 9,528 municipalities supplied by the network
• 77% of the French population lives in a municipality served by GRDF gas
• 130 Emergency Gas operators respond 24/7 to all gas-related emergencies
• 18 biomethane injection sites

A dynamic company

• 11,431 employees
• 582 new hires and 400 apprentices trained in 2016
• €3.029 billion in revenue in 2015

GRDF combines technical excellence, reliability, and societal responsibility to support the energy needs of France while contributing to the nation’s energy transition.

Ecological. Economically Viable. Regional.

naturenergie draws on over 100 years of experience in producing, distributing, and selling green hydroelectricity.

With a strong regional presence in southern Baden and Switzerland, naturenergie is a locally rooted energy provider. As a local partner, the group brings together individuals, municipalities, and businesses, helping them embrace sustainability in their daily lives and operations across southern Baden and Switzerland.

Through its own electricity distribution networks and energy solutions, naturenergie creates the conditions for a successful energy transition. It generates and supplies renewable energy from hydropower and solar sources, and its portfolio includes photovoltaics, heating, construction, housing, and e-mobility.

The successful implementation of the energy transition in south-west Germany depends on strong regional players like badenova.

Based in Freiburg, this energy and environmental services provider collaborates with nearly 100 cities and municipalities. Badenova has already delivered numerous successful projects in wind, solar, and biomass energy. Year after year, its shareholders, which are almost exclusively municipalities, invest 3% of the company’s profits into an innovation fund for climate and water protection, enabling the development of flagship ecological projects.

Environmental commitment and green innovation have always been central to badenova’s identity. The company supplies households with green electricity and offers customised products for businesses that include renewable electricity. For several years, badenova has also produced regionally sourced natural gas from sustainable agriculture and forestry. Biogas facilities are located in Neuried, the Brisgau industrial zone, and Forchheim, where a processing plant has been established.

Badenova is actively developing local wind energy potential in the Black Forest and the Ortenau region. Its partners include Freiburg’s Ökostrom group and the regiowind GmbH cooperative. To date, 13 wind turbines with a combined capacity of 25 MW have been installed, generating nearly 33 million kWh of electricity per year. A distinctive feature of these projects is their participatory approach, involving around 1,000 local citizens.

Badenova’s subsidiary Wärmeplus is currently entrusted with the company’s wind energy operations. It is building a major wind farm expected to supply electricity to 10,000 households from summer 2016.

A Union of Expertise: Geo-Energie Suisse SA

Deep geothermal energy represents Switzerland’s most promising indigenous, CO₂-free renewable energy source.

Geo-Energie Suisse SA was founded by a consortium of Swiss energy providers committed to advancing deep geothermal energy for electricity and heat production in Switzerland. These companies joined forces, pooling their expertise and resources to develop this emerging technology and creating a shared platform through Geo-Energie Suisse SA to manage economic and technological risks collectively.

The company’s primary goal is to develop pilot projects that demonstrate the technical feasibility of deep geothermal energy in the medium term and its economic viability in the longer term. At the same time, Geo-Energie Suisse SA aims to foster public understanding and acceptance of deep geothermal energy.

Primeo Energie (formerly Genossenschaft Elektra Birseck) is a Swiss energy provider headquartered in Münchenstein, Basel-Landschaft. Since 1897, it has operated as a private cooperative in the international energy sector. Its activities cover electricity and heat production through local supply networks, alongside the promotion of renewable energy and energy efficiency.

Primeo Energie Netz AG owns the entire shared network infrastructure. It manages and controls electricity flows and regulates energy distribution within the Primeo Energie service area, serving around 235,000 households and businesses. The company is also responsible for constructing and maintaining the network infrastructure. In the Alsace section of the network, these tasks are carried out by Primeo Energie Réseau de Distribution SAS.

Primeo Energie Energie supplies, delivers, and markets energy. Its product range includes basic electricity supply, full or partial supply of standard, grey, or green electricity, and market-based products. The company also aims to produce renewable electricity through the construction of hydro, wind, and solar plants, targeting 50% of its energy supply from renewables.

Primeo Energie’s heat contracting offers a convenient, reliable, and efficient solution for heating needs. The company develops and operates both local heat networks and larger-scale heat supply facilities. As a leading provider of local heating, Primeo Energie operates over 220 heat installations across Switzerland and Alsace.

True to its vision, Primeo Energie continues to strengthen its reputation as a modern, customer-oriented, and economically robust provider. With 400 employees, including 15 apprentices, the company is a trusted energy partner.

ES – The Local Energy Provider Serving Its Region

ES is a local energy company with over 1,310 employees, structured around three core activities:

• Electricity distribution
• Electricity and gas supply
• Energy services and renewable energy (ENR)

The company generates an annual turnover of over €950 million.

Electricity Distribution

ES Réseaux builds, operates, maintains, and renews a high- and low-voltage network spanning over 14,000 km, serving 409 communes in the Bas-Rhin. The network’s reliability places ES Réseaux among the best distributors, with an average outage time (“Critère B”) below seven minutes in recent years. Annual investment in the network amounts to around €40 million.

Electricity and Gas Supply

ES Énergies supplies nearly 500,000 customers with electricity and gas and develops a wide range of customer services, particularly in digital solutions, including an online customer portal, consumption monitoring and management tools, and energy efficiency support. The company is also developing energy production projects in photovoltaics and small- to micro-hydropower, in partnership with national stakeholders.

Energy Services and Renewable Energy (ENR)

Aware of current climate challenges, ES Énergies actively promotes clean energy production, energy-efficient building solutions, and low-consumption building renovations.

ES has long been involved in deep geothermal energy, participating in a GEIE in Soultz-Sous-Forêts since the 1980s, developing unique expertise recognised across Europe, and founding a specialist subsidiary, ES Géothermie, in 2008. An Enhanced Geothermal System (EGS) model was developed here, leading to the first industrial deep geothermal project for the industrial sector in Rittershoffen in partnership with an industrial partner and the Caisse des Dépôts. This 25 MWth project achieved full technical success and began operations in July 2016. ES is now developing new EGS projects in northern Alsace and around the Eurométropole of Strasbourg.

The company is also carrying out a major biomass cogeneration plant project, enabling one of Strasbourg’s three main district heating networks to achieve over 70% renewable energy content.

Thanks to the synergy between its activities and expertise, ES offers a full spectrum of energy services. Nearly 160 employees work within ES Energy Services, covering all markets and providing extended service offerings:

• Operation and maintenance of major district heating networks
• Operation of heat production plants
• Thermal engineering and renewable energy production
• Electrical engineering
• Lighting engineering and maintenance
• Technical management of buildings and associated remote services
• Catering engineering