Demeter

Demeter Partners is a private equity and venture capital firm based in Paris, France, founded in 2005. It focuses on investments that support the ecological transition, targeting companies across various stages of development, including seed, start-up, early-stage, and growth. The firm primarily invests in sectors such as eco-industries, eco-energies, green technology, and alternative energy resources. Specific areas of interest include water, air, and waste treatment, energy efficiency, and renewable energies, as well as infrastructure projects related to sustainable energy. Demeter typically invests between €0.5 million and €30 million in small to medium-sized enterprises and prefers to take minority stakes while seeking board representation in its portfolio companies. While the firm predominantly operates in Europe, particularly in France, it also explores opportunities in North America and other regions. Demeter is recognized as a significant player in the European private equity landscape, particularly following its merger with Emertec Gestion in 2016, which enhanced its focus on the energy transition and environmental sectors.

Thomas Beaugendre

Investment Manager

Grégory Besson-Moreau

Partner

Marie Bolognini

Investment Manager

Olivier Bordelanne

Partner

Cyrille Cabaret

Partner

Marie Cartet

Investment Manager

Céline Charvin

Investment Director

Stéphanie Chretien

Partner

Lionel Cormier

Managing Partner

Julien Coudy

Partner

Gonzague Dejouany

Partner

Christophe Desrumaux

Partner

Philippe Detours

General Partner, member of the management board, Head of Infrastructure

Geoffroy Dubus

Partner

Olivier Dupont

Founding Partner

Assia Gaouar

Partner

Frédéric Gilbert

Partner and Member of the Investment Committee

Sophie Guesnerot

Founder, Managing Partner

Stephanie Hillard

Investment Director

Amaury Kalt

Investment Director

Adeline Kempf

Investment Director

Yann Lagalaye

General Partner

Eric Marty

Managing Partner

Olivier Masseran

Partner

Bernard Maître

Venture Partner

Quentin Mulaton

Investment Manager

Majdi Najah Ph.D

Investment Director

Sophie Paturle-Guesnerot

Co-Founder and Managing Partner

Jérôme Petitjean

Partner, Infrastructure

Jean-Charles Scatena

Partner, Co-Chief Financial and Chief Operations Officer

Holger Schragmann

Partner

Riadh Shaïek

Partner

Louis Truchon-Bartes

Investment Manager

Olivier Usureau

Partner

Stéphane Villecroze

Managing Partner

Past deals in Energy Efficiency

Plan A

Series A in 2021
Plan A is a data-driven B2B SaaS platform that assists businesses in calculating, monitoring, and offsetting their carbon footprint. The platform generates personalized sustainability action plans tailored to each company's specific emissions profile. By leveraging advanced technologies and the latest scientific standards, Plan A enables organizations to manage their net-zero journey independently. This includes data collection, emissions calculation, target setting, decarbonization planning, and compliance tracking for economic, social, and governance reporting. Through its comprehensive approach, Plan A empowers businesses to enhance their sustainability efforts effectively.

SWEETCH Energy

Venture Round in 2021
SWEETCH Energy is developing a breakthrough technology in the field of salinity gradient power harvesting.

See You Sun

Series A in 2021
See You Sun specializes in electric mobility and renewable energy solutions, focusing on the development of solar photovoltaic power plants for various sectors, including communities, industrial, commercial, and retail. The company's offerings encompass a range of features such as individual and collective self-consumption, power purchase agreements, energy storage, and infrastructure for electric vehicle and bicycle charging. Additionally, See You Sun provides self-service bicycle rentals and systems for rainwater harvesting and storage. Through these initiatives, the company aims to facilitate the generation of clean electricity, reduce dependence on conventional energy sources, and help customers lower their energy expenses.

Plan A

Seed Round in 2021
Plan A is a data-driven B2B SaaS platform that assists businesses in calculating, monitoring, and offsetting their carbon footprint. The platform generates personalized sustainability action plans tailored to each company's specific emissions profile. By leveraging advanced technologies and the latest scientific standards, Plan A enables organizations to manage their net-zero journey independently. This includes data collection, emissions calculation, target setting, decarbonization planning, and compliance tracking for economic, social, and governance reporting. Through its comprehensive approach, Plan A empowers businesses to enhance their sustainability efforts effectively.

BeFC Bioenzymatic Fuel Cells

Seed Round in 2020
BeFC Bioenzymatic Fuel Cells is a company based in Grenoble, France, founded in 2020, that specializes in developing eco-friendly energy solutions. The company focuses on creating paper-based, ultra-thin, flexible, and miniature bioenzymatic fuel cell systems designed for sustainable energy generation. These innovative devices provide a safer alternative to traditional button or coin cell batteries, which are often difficult to recycle and environmentally harmful. BeFC's technology aims to address the growing need for sustainable power sources in disposable medical and wearable devices, facilitating the advancement of single-use applications while minimizing ecological impact. Additionally, its fuel cells present new opportunities for low-power applications in health monitoring, logistics, and the Internet of Things (IoT).

ZE Energy

Seed Round in 2020
ZE Energy SAS is an independent producer of renewable energy based in Paris, France. Established in 2019, the company focuses on developing, building, and operating hybrid solar power plants that integrate photovoltaic technology with energy storage capabilities. By equipping its plants with batteries to store solar energy generated during the day, ZE Energy offers a solution that enhances the efficiency of solar power while ensuring zero CO2 emissions. The company's commitment to sustainability also extends to marketing green energy, providing consumers access to clean energy alternatives. Through its initiatives, ZE Energy aims to contribute to the decarbonization of the planet.

MyLight Systems

Venture Round in 2020
MyLight Systems specializes in energy management solutions that empower homeowners to produce and utilize their own solar electricity. The company focuses on creating solar self-consumption systems that optimize the use of energy generated by photovoltaic (PV) panels. By enhancing the efficiency of local PV energy consumption, MyLight Systems aims to help users significantly reduce their electricity costs and achieve energy independence. Their innovative approach benefits both residential and tertiary sectors, allowing for substantial savings while promoting sustainable energy practices.

Wattsense

Seed Round in 2019
Wattsense is a technology company that specializes in providing a non-intrusive building connectivity service, enabling efficient management of building systems. Founded in 2017 and based in Villefranche-sur-Saône, France, Wattsense offers an API platform that facilitates the connection of cloud applications to building management systems and HVAC equipment. This platform features real-time connectivity status, an up-to-date database of HVAC equipment and environmental data, and interfaces for energy optimization and maintenance support applications. By coordinating the interaction between HVAC equipment owners and optimization services, Wattsense helps clients reduce energy consumption and enhance occupant comfort. Its solutions are designed for businesses of all sizes, from startups to large public companies, allowing them to deploy applications effectively within their facilities.

Alterea Group

Private Equity Round in 2019
Alterea is a renovation projects, construction and energy optimization projects in the areas of social and condominiums, public works, tertiary buildings, commercial, industrial and medical.

Deepki

Series B in 2019
Deepki SAS, founded in 2014 by Vincent Bryant and Emmanuel Blanchet, is a Paris-based company specializing in data analysis for energy efficiency. The firm focuses on identifying energy savings across numerous buildings simultaneously. By leveraging advanced data analytics, Deepki aims to optimize energy consumption and promote sustainable practices in the built environment.

Ergosup

Series B in 2019
Ergosup is a company based in Malataverne, France, that specializes in the development of decentralized hydrogen-energy production systems. The firm has created an innovative process for producing high-pressure hydrogen on-site, which facilitates the refueling of hydrogen fuel vehicles. Ergosup provides generators that store and convert electricity into hydrogen under pressure, enabling the co-generation of electric power for hydrogen service stations and various industrial applications. This technology allows clients to achieve zero-emission solutions for mobility applications, contributing to a more sustainable energy future.

Stimergy

Venture Round in 2018
Stimergy, based in Grenoble, France, operates eco-friendly data centers that enhance energy efficiency by recycling heat generated from computer servers. Founded in 2013, the company installs mini-data centers in secure areas of residential buildings, utilizing a digital boiler to convert waste heat into hot water for these buildings. This innovative approach integrates data centers into the smart city ecosystem, creating a resilient computing grid interconnected by optical fiber. Additionally, Stimergy offers project development services tailored for animation studios, helping to determine the necessary server allocation, computing power, storage speed, and connection speed for specific projects. The company's efforts reflect a commitment to sustainability and efficiency in data management.

EnergieIP

Series A in 2017
Energie IP is a company based in Paris, France, that specializes in building automation solutions. The firm has developed a building management system platform that enables the integration of power devices and data exchange through standard Ethernet cables. This platform focuses on providing an open and secure technology that operates on low DC energy, allowing for efficient energy distribution across buildings. Additionally, Energie IP's system facilitates communication with intelligent robots and equipment, as well as supports the development of geolocation platforms utilizing artificial intelligence.

SWEETCH Energy

Venture Round in 2017
SWEETCH Energy is developing a breakthrough technology in the field of salinity gradient power harvesting.

Cozynergy

Venture Round in 2017
Cozynergy SAS provides energy renovation works for residential homes. It handles insulation, carpentry, heating and air conditioning, ventilation, photovoltaic, and automation works. The company was incorporated in 2013 and is based in Toulouse, France with additional offices in Bordeaux, Montpellier, and Paris, France.

Deepki

Series A in 2016
Deepki SAS, founded in 2014 by Vincent Bryant and Emmanuel Blanchet, is a Paris-based company specializing in data analysis for energy efficiency. The firm focuses on identifying energy savings across numerous buildings simultaneously. By leveraging advanced data analytics, Deepki aims to optimize energy consumption and promote sustainable practices in the built environment.

Stimergy

Seed Round in 2016
Stimergy, based in Grenoble, France, operates eco-friendly data centers that enhance energy efficiency by recycling heat generated from computer servers. Founded in 2013, the company installs mini-data centers in secure areas of residential buildings, utilizing a digital boiler to convert waste heat into hot water for these buildings. This innovative approach integrates data centers into the smart city ecosystem, creating a resilient computing grid interconnected by optical fiber. Additionally, Stimergy offers project development services tailored for animation studios, helping to determine the necessary server allocation, computing power, storage speed, and connection speed for specific projects. The company's efforts reflect a commitment to sustainability and efficiency in data management.

Ergosup

Series A in 2015
Ergosup is a company based in Malataverne, France, that specializes in the development of decentralized hydrogen-energy production systems. The firm has created an innovative process for producing high-pressure hydrogen on-site, which facilitates the refueling of hydrogen fuel vehicles. Ergosup provides generators that store and convert electricity into hydrogen under pressure, enabling the co-generation of electric power for hydrogen service stations and various industrial applications. This technology allows clients to achieve zero-emission solutions for mobility applications, contributing to a more sustainable energy future.

Enerbee

Venture Round in 2015
EnerBee SAS, founded in 2014 and based in Grenoble, France, specializes in developing motion-based energy-harvesting solutions aimed at eliminating the need for batteries in both industrial and consumer connected devices. The company focuses on providing its innovative energy harvesters for a variety of applications, including wristwatches, remote sensors, smart home technologies, and industrial systems. By harnessing motion to generate power, EnerBee addresses the significant global demand for autonomous energy solutions, particularly in a market where billions of coin cell batteries are sold annually. With its multi-patented technology, EnerBee is poised to transform how wireless connected objects are powered, offering a sustainable alternative to traditional battery dependency.

Sunna Design

Venture Round in 2014
Sunna Design is a France-based company that designs and produces LED and solar lighting solutions. The company offers integrated solar street lights for isolated and urban areas, and specific projects; and smart grids powered by solar energy. It also provides design solutions. Sunna Design’s products are used in public spaces with little to no access to electricity. It was founded in 2011 and is headquartered in Blanquefort, France.

Cozynergy

Private Equity Round in 2014
Cozynergy SAS provides energy renovation works for residential homes. It handles insulation, carpentry, heating and air conditioning, ventilation, photovoltaic, and automation works. The company was incorporated in 2013 and is based in Toulouse, France with additional offices in Bordeaux, Montpellier, and Paris, France.

Qualisteo

Venture Round in 2014
Qualisteo SAS, founded in 2010 and based in Nice, France, specializes in energy efficiency monitoring through its software tool, Wattseeker. This technology is designed to audit electrical consumption across entire buildings, providing detailed insights by usage, equipment, and zone. By enabling enterprises to measure and control their electricity consumption, Qualisteo helps optimize their environmental footprint and reduce electricity costs. The company offers installation services and valuable reports on electrical consumption, contributing to energy savings and more informed decision-making for industrial sites.

Cooltech Applications

Venture Round in 2013
COOLTECH APPLICATIONS SAS develops and commercializes magnetic refrigeration products for commercial refrigeration equipment manufacturing markets. It also offers custom development solutions, such as magnetocaloric materials and magnetocaloric systems. The company serves refrigeration markets, such as commercial refrigeration, transport, industrial cold, and home appliance markets; and air conditioning markets, including automotive, residential, and commercial markets worldwide. COOLTECH APPLICATIONS SAS was founded in 2003 and is headquartered in Holtzheim, France with additional offices in Paris.

Cooltech Applications

Venture Round in 2013
COOLTECH APPLICATIONS SAS develops and commercializes magnetic refrigeration products for commercial refrigeration equipment manufacturing markets. It also offers custom development solutions, such as magnetocaloric materials and magnetocaloric systems. The company serves refrigeration markets, such as commercial refrigeration, transport, industrial cold, and home appliance markets; and air conditioning markets, including automotive, residential, and commercial markets worldwide. COOLTECH APPLICATIONS SAS was founded in 2003 and is headquartered in Holtzheim, France with additional offices in Paris.

Renewable Power International

Acquisition in 2011
Renewable Power International, S.A.U. is an independent power producer based in Madrid, Spain, specializing in renewable energy. Established in 1987, the company focuses on the identification, development, and management of renewable energy projects, specifically in hydrological, wind, and solar-photovoltaic sectors. It owns and operates 20 small hydro plants in Spain and Portugal, totaling 88.5 MW of installed capacity, and also manages power plants and photovoltaic parks for third-party clients. By covering the entire value chain of its projects—from initial promotion and financing to construction, operation, and maintenance—Renewable Power International plays a significant role in advancing renewable energy initiatives in the region. The company was previously known as Minicentrales Dos, S.A.U. and rebranded in November 2014. It operates as a subsidiary of Hydrocontracting GmbH, Minicentrales, S.A.

SolFocus

Series C in 2009
SolFocus's mission is to enable solar energy generation at a Levelized Cost of Energy (LCOE) competitive with traditional fossil fuel sources. To achieve this goal, SolFocus has developed leading concentrator photovoltaic (CPV) technology which combines high-efficiency solar cells (approaching 40%) and advanced optics to provide solar energy solutions which are scalable, dependable and capable of delivering on the promise of clean, low-cost, renewable energy.

Engie Solar

Series C in 2008
Solairedirect is an integrated solar power provider, present on the photovoltaic value chain from module production to decentralized power network operation. The company develops and operates infrastructures of all sizes (rooftop and ground-mounted) with turnkey service offers (design and engineering, installation and construction, financing, operation and maintenance) as part of carbon footprint community projects. Solairedirect’s mission is to provide everyone with the choice of clean and home-based electricity, producing reliable, high performance, low-cost and smart solar kilowatt-hours. It systematically implements technology, manufacturing and service innovations with the stated intention to be among the first power producers to reach grid parity in France and other countries.

JMB Energie

Series A in 2008
JMB ENERGY is a producer of renewable electricity, which positions its activity in 2 key areas of renewable energy: the wind and solar photovoltaics. Ultimately, its development will enable it to expand its reach to areas of biomass, and the hydraulics.

SulfurCell

Private Equity Round in 2008
SulfurCell is a German developer and manufacturer of thin-film, electricity-generating solar modules. Sulfurcell's thin-film modules have demonstrated some of the highest energy conversion efficiencies for thin-film PV. Sulfurcell's product also offers scalability — a crucial component for high-volume supply — bringing the solar industry one step closer to mainstream applications.

Engie Solar

Series B in 2008
Solairedirect is an integrated solar power provider, present on the photovoltaic value chain from module production to decentralized power network operation. The company develops and operates infrastructures of all sizes (rooftop and ground-mounted) with turnkey service offers (design and engineering, installation and construction, financing, operation and maintenance) as part of carbon footprint community projects. Solairedirect’s mission is to provide everyone with the choice of clean and home-based electricity, producing reliable, high performance, low-cost and smart solar kilowatt-hours. It systematically implements technology, manufacturing and service innovations with the stated intention to be among the first power producers to reach grid parity in France and other countries.

Panosol

Series A in 2008
Panosol is a solar panel installation company based in Toulouse, France, established in 2008. It specializes in the installation of photovoltaic panels and solar thermal systems, providing clients with a comprehensive service that includes design, sale, installation, and after-sales support. The company aims to assist customers in transitioning to solar energy, enabling them to save on energy costs or invest in green electricity for resale. Panosol emphasizes its commitment to sustainability and social responsibility, striving to develop its business in an economically, socially, and environmentally conscious manner.

IES Synergy

Acquisition in 2006
IES Synergy designs and manufactures power conversion solutions for the electric vehicle (EV) market. They provide onboard and external battery charging solutions for the consumer and industrial EV markets. Their solutions offer new answers to the electromobility challenge, providing compact and durable products for use in any outside environment, thanks to our unique proprietary high-frequency KEYWATT and ELIPS technologies. IES Synergy was founded in 1992 and is headquartered in Saint Aunès, France.
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