Demeter Partners

Demeter Partners is a private equity and venture capital firm established in 2005 and headquartered in Paris, France, with additional offices in Spain and Germany. The firm specializes in investing in companies that contribute to the ecological transition, focusing on sectors such as clean technology, renewable energy, energy efficiency, and environmental services. Demeter Partners allocates capital to companies at various stages of development, including innovative startups, high-growth small and medium-sized enterprises, and infrastructure projects, typically investing between €0.5 million and €30 million. Its investment strategy emphasizes eco-industries, green technologies, and sectors aimed at preventing modern-day hazards, such as industrial accidents and health risks. The firm primarily targets mid-cap and small to medium-sized mature unlisted companies in Europe, particularly in France, but also considers opportunities in North America and globally. Demeter Partners usually takes minority stakes in its portfolio companies and seeks to participate actively by holding board seats.

Thomas Beaugendre

Investment Manager

Olivier Bordelanne

Partner

Marie Cartet

Investment Manager

Lionel Cormier

Managing Partner

Dejouany, Gonzague

Partner

Christophe Desrumaux

Partner

Philippe Detours

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

Dupont, Olivier

Founding Partner

Assia Gaouar

Partner

Frédéric Gilbert

Partner and Member of the Investment Committee

Sophie Guesnerot

Founder, Managing Partner

Stéphanie Hillard

Investment Director

Amaury Kalt

Investment Director

Adeline Kempf

Investment Director

Yann Lagalaye

General Partner

Lamothe, Benjamin

Investment Manager

Olivier Masseran

Partner

Bernard Maître

Venture Partner

Quentin Mulaton

Investment Manager

Majdi Najah Ph.D

Investment Director

Jean Charles Scatena

Investment Director, Partner

Stéphane Villecroze

Managing Partner

Celine Charvin

Investment Director

Past deals in Renewables

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 is a developer, builder, and operator specializing in solar photovoltaic power plants tailored for communities, industrial, commercial, and retail sectors. The company offers a range of solutions that include individual and collective self-consumption, power purchase agreements, energy storage systems, and electric vehicle and bicycle charging stations. Additionally, See You Sun provides self-service bicycle rentals and rainwater harvesting systems. By integrating these features, the company enables markets to generate clean electricity, reduce dependence on conventional energy sources, and lower energy costs, while promoting electric mobility and renewable energy production.

BeFC Bioenzymatic Fuel Cells

Seed Round in 2020
BeFC Bioenzymatic Fuel Cells provide Eco-friendly paper-based bio-enzymatic fuel cells for sustainable energy generation. Electronics integration in disposable medical and wearable medical devices has become increasingly important. The button or coin cell power sources used are difficult to recycle, toxic, or dangerous to the environment. The development of safe and ecological devices is often a barrier to the progression of single-use and single-patient devices. BeFC offers a sustainable and eco-friendly solution for practical energy generation whilst minimizing the impact on the environment. We believe our approach will not only allow the replacement of batteries for existing applications, but also open up new opportunities for low-power ultra-thin health monitoring, logistics/transportation monitoring, and Internet of Things (IoT) applications.

ZE Energy

Seed Round in 2020
ZE Energy is provides a hybrid solar plant solution featuring energy storage capabilities and photovoltaics. Equipped with a battery that stores the solar energy generated throughout the day, its power plants boast the advantages of solar power in terms of production costs, integration to the environment and power grid, as well as the generation of zero CO2 emissions.

envelio

Series A in 2019
envelio GmbH, founded in 2017 and based in Cologne, Germany, specializes in developing software and algorithms aimed at enhancing the planning and operation of energy networks. Its primary offering, the Intelligent Grid Platform (IGP), serves as a modular software solution that assists distribution grid operators in digitizing and automating their processes. The IGP includes applications for data quality, grid planning, and grid operation, which help identify and rectify data inconsistencies and optimize congestion management. By leveraging artificial intelligence and mathematical optimization, envelio’s platform supports the integration of numerous distributed energy resources and smart meter data, enabling grid operators to manage the complexities of modern power grids while facilitating a smoother energy transition.

Proviridis

Venture Round in 2019
Proviridis specializes in alternative technologies and fuels for vehicles, focusing on the development and manufacturing of fuel distribution products. The company provides natural gas solutions, as well as fast electric recharging stations and hydrogen stations designed for range extenders. By offering these innovative fueling options, Proviridis aims to meet the economic and environmental needs of transport professionals, helping clients minimize their ecological footprint without incurring significant costs.

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.

Ergosup

Series B in 2019
Ergosup developes an innovative process for producing high pressure hydrogen on site for refueling hydrogen fuel vehicles.

Stimergy

Venture Round in 2018
Stimergy, based in Grenoble, France, operates eco-friendly data centers that integrate seamlessly into the smart city ecosystem. Established in 2013, the company installs mini-data centers within secure technical areas of residential buildings, employing a digital boiler system to recycle heat generated by computer servers. This reclaimed heat is utilized to produce hot water for the connected buildings, enhancing overall energy efficiency. Additionally, Stimergy provides project development services tailored for animation studios, which include optimizing server allocation, computing power, storage speed, and connection speed for various projects. By creating an interconnected computing grid through optical fiber, Stimergy offers a resilient and high-performance solution for modern data management.

envelio

Seed Round in 2018
envelio GmbH, founded in 2017 and based in Cologne, Germany, specializes in developing software and algorithms aimed at enhancing the planning and operation of energy networks. Its primary offering, the Intelligent Grid Platform (IGP), serves as a modular software solution that assists distribution grid operators in digitizing and automating their processes. The IGP includes applications for data quality, grid planning, and grid operation, which help identify and rectify data inconsistencies and optimize congestion management. By leveraging artificial intelligence and mathematical optimization, envelio’s platform supports the integration of numerous distributed energy resources and smart meter data, enabling grid operators to manage the complexities of modern power grids while facilitating a smoother energy transition.

COGEBIO

Private Equity Round in 2017
COGEBIO is a French company based in Irigny that specializes in the design, manufacture, and installation of energy recovery units that utilize biomass, such as wood chips and agricultural by-products, to generate heat and electricity. Founded in 2009, COGEBIO's technology allows industrial sectors to replace fossil-fuel burners in furnaces or boiler dryers without the need for modifications. This innovation helps industries meet their heat requirements while significantly reducing fossil fuel consumption and lowering energy costs.

SWEETCH Energy

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

H2air SAS

Private Equity Round in 2017
H2air is an independent French wind developer and operator.

Cozynergy

Venture Round in 2017
Cozynergy is a service company specializing in energy renovation, focusing on improving comfort and energy efficiency in individual homes. It offers a comprehensive range of technologies designed for energy preservation, allowing customers to enhance their real estate assets while reducing energy costs. By prioritizing the energy renovation market, Cozynergy aims to provide effective solutions that contribute to sustainable living and lower utility expenses for homeowners.

Soparsol

Private Equity Round in 2016
Soparsol Is A Project Company Detaining A Brownfield Portfolio Of 6 Operating Photovoltaic Plants Installed On Roof Tops And Parking Lots, With A Total Commissioned Capacity Of 12.8 MWc.

Sabella

Venture Round in 2016
Sabella is a developer of marine current turbines that provides reliable energy solutions globally. The company offers a range of innovative and economically optimized technologies, supported by patents, to promote sustainable energy models tailored for remote grids, particularly in islands and isolated coastal communities. In addition to its turbine technology, Sabella also delivers engineering and project management services to facilitate the installation of its systems, allowing clients to transition to sustainable energy with ease.

Kemwatt SAS

Private Equity Round in 2016
Kemwatt SAS designs, develops, manufactures, and markets batteries with circulating electrolytes for application in stationary storage of electricity to facilitate the management of the network within the framework of renewable electrical production.

Stimergy

Seed Round in 2016
Stimergy, based in Grenoble, France, operates eco-friendly data centers that integrate seamlessly into the smart city ecosystem. Established in 2013, the company installs mini-data centers within secure technical areas of residential buildings, employing a digital boiler system to recycle heat generated by computer servers. This reclaimed heat is utilized to produce hot water for the connected buildings, enhancing overall energy efficiency. Additionally, Stimergy provides project development services tailored for animation studios, which include optimizing server allocation, computing power, storage speed, and connection speed for various projects. By creating an interconnected computing grid through optical fiber, Stimergy offers a resilient and high-performance solution for modern data management.

Ergosup

Series A in 2015
Ergosup developes an innovative process for producing high pressure hydrogen on site for refueling hydrogen fuel vehicles.

Enerbee

Venture Round in 2015
EnerBee is an industrial start-up focused on developing innovative energy harvesting technology that generates power from motion. This technology aims to replace traditional batteries in consumer and industrial smart devices, which are widely used in everyday items like watches, remote controls, and various connected devices. With over 30 billion coin cell batteries sold annually, EnerBee's multi-patented motion-based generators offer a sustainable alternative by providing fully autonomous energy solutions. The company's products can support functions such as speed measurement, radio communication, and additional sensors, thereby helping users reduce reliance on batteries and save energy and costs.

Sunna Design

Venture Round in 2014
Sunna Design is a France-based company established in 2011 and headquartered in Blanquefort. The firm specializes in designing and producing LED and solar lighting solutions, focusing primarily on integrated solar street lights for both isolated and urban environments. Sunna Design aims to provide reliable and sustainable public lighting, particularly in areas with limited or no access to electricity. Their products facilitate the use of renewable energy sources, helping clients reduce pollution and save costs. Additionally, the company offers design solutions and smart grids powered by solar energy, contributing to more efficient public lighting infrastructure.

Cozynergy

Private Equity Round in 2014
Cozynergy is a service company specializing in energy renovation, focusing on improving comfort and energy efficiency in individual homes. It offers a comprehensive range of technologies designed for energy preservation, allowing customers to enhance their real estate assets while reducing energy costs. By prioritizing the energy renovation market, Cozynergy aims to provide effective solutions that contribute to sustainable living and lower utility expenses for homeowners.

Qualisteo

Venture Round in 2014
Qualisteo, a start-up company based in Nice specialised in smart grids company.
Renewable Power International, S.A.U. is an independent power producer based in Madrid, Spain, specializing in the development and management of renewable energy projects. The company focuses on generating electricity through hydrological, wind, and solar-photovoltaic sources. It owns and operates 20 small hydro plants in Spain and Portugal, with a total installed capacity of 88.5 MW. Additionally, Renewable Power International manages and maintains power plants and photovoltaic parks for third-party clients. Established in 1987, the company was previously known as Minicentrales Dos, S.A.U. and rebranded in November 2014. It is 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.

Methaneo

Venture Round in 2008
Methaneo focuses on the development of collective biogas projects utilizing biomass derived from agricultural and food waste. The company employs anaerobic digestion, a fermentation process that converts organic matter into renewable energy, specifically biogas rich in methane. Methaneo emphasizes the creation of "territorial" biogas projects that involve multiple local partners, including biomass suppliers and heat recovery entities from industries, farms, and communities. This collaborative approach distinguishes their projects from traditional anaerobic digestion, which typically relies on a single participant. By fostering partnerships, Methaneo aims to enhance the sustainability and efficiency of energy production while contributing to the circular economy.

Engie Solar

Series C in 2008
Solairedirect is an integrated solar power provider delivering home-based electricity and smart solar kilowatt-hours for its users.

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 delivering home-based electricity and smart solar kilowatt-hours for its users.

RVX

Series A in 2008
RVX specializes in the field of the engineering processes. RVX develops and implements treatment plants and recycling of your waste while maximizing efficiency of your production to limit discharges.

PANOSOL

Series A in 2008
PANOSOL is an installer of photovoltaic panels (electricity) and solar thermal (heat). To save energy or to invest and then sell green electricity to EDF, PANOSOL 'helps its clients a comprehensive approach: design, sale, installation and after-sales service and offers a balance of control after one year. Besides his technical expertise, PANOSOL 'day after day trying to become a more responsible company that develops sustainably on routes to the economic, social, environmental and societal. PANOSOL was founded in 2008 and is based in Toulouse, France.

VERGNET

Acquisition in 2006
VERGNET is a global provider of renewable energy solutions, specializing in hybrid systems that encompass wind and solar energy applications. Founded in 1989 and headquartered in Ormes, France, the company focuses on creating sustainable and profitable infrastructures for energy and water development. VERGNET designs, produces, markets, and installs wind energy production facilities and potable water supply systems, addressing complex challenges through tailored solutions that meet the specific needs of its customers.
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