Our story
Founded in 1979, Eren Groupe (an acronym for Économie des REssources Naturelles – Natural Resource Economics) has established itself over more than 40 years as a pioneer of the energy transition in Europe
With an entrepreneurial culture rooted in the long term, the group develops and finances concrete low-carbon solutions that reduce emissions and preserve natural resources. With more than €2 billion in assets under management and around forty holdings in the energy sector, Eren Groupe has a unique investment capacity that enables it to accelerate the roll-out of projects with a strong climate impact, from renewable energy to storage and the decarbonisation of buildings and regions.
Eren Low-Carbon Buildings
Eren Low-Carbon Buildings is the group’s brand dedicated to the long-term performance of buildings. Its ambition: to turn its clients’ energy consumption into a genuine measurable competitive advantage, working site by site or across an entire real estate portfolio. The targeted results are ambitious and concrete: up to 80% reduction in energy consumption and 95% fewer CO₂ emissions across an entire building portfolio.
Eren Low-Carbon Buildings structures its support around five key missions:
Accenta supports every real estate sector in enhancing the value of their assets and reducing their costs through energy and carbon performance. A pioneer of hybrid geo-storage, the brand combines geothermal energy, AI and human expertise to produce decarbonised heating and cooling and to manage buildings intelligently. The result: up to 80% less energy consumption and 95% of CO₂ emissions avoided, with or without CAPEX, on a single site or across a portfolio.
An established player for nearly 40 years, Esmé Solutions specialises in implementing technical solutions for connected buildings. Its platform centralises all building data in a 3D BIM environment, making it possible to supervise, control and optimise technical installations in real time. The goal: to give commercial and industrial property managers simple means to control their energy spending while guaranteeing comfort and regulatory compliance.
Fafco develops ice-based thermal energy storage solutions, making it possible to store energy at night to meet cooling needs during the day. Its technology offers tailored performance and unrivalled control, significantly reducing energy bills and peaks in electricity consumption. With 3,650 MWh installed and 1,470 storage units deployed worldwide, Fafco has established itself as an international benchmark in thermal storage
Water Horizon is a Toulouse-based deeptech company that has developed the world’s first mobile thermal battery. Its patented technology converts industrial waste heat (energy that was previously lost) into renewable cooling or heat, redistributed to another site at another time. In Cooling as a Service mode, the client pays only for the energy consumed, with no upfront investment: Water Horizon sizes, finances and operates the entire infrastructure.
Eren Energy Storage, the result of an alliance between Belgian entrepreneurs and Eren Groupe, offers industrial battery management solutions to optimise energy consumption at industrial and commercial sites. The batteries integrate with photovoltaic panels, charging points and industrial equipment to maximise self-consumption, reduce distribution costs and monetise electricity on the markets. Three financing models are available (from full investment by Eren to the conventional CAPEX model) for savings from the very first year.
Green Energy Service (GES) is a leading French player in energy efficiency, high-performance renovation and building decarbonisation. With comprehensive expertise covering the entire energy value chain, GES helps more than 28,000 clients achieve lasting reductions in their energy consumption: from energy audits and identifying potential savings, through to design, carrying out the works and monitoring performance over time.
The Mouratoglou Tennis Academy called on Accenta to deliver on its environmental ambitions.
The assignment was to equip the 600 m² of offices and 12,000 m² of hotel space with a clean and cost-effective heating and cooling production system.
P3 Logistic Parks, a major player in logistics real estate in Europe, and Poste Immobilier entrusted Accenta with replacing the heating system of a 19,000 m² warehouse located in Grand-Couronne, near Rouen.
The Wonder Building is a large-scale project converting a former industrial brownfield into a state-of-the-art office building.
The Mouratoglou Tennis Academy called on Accenta to deliver on its environmental ambitions.
The assignment was to equip the 600 m² of offices and 12,000 m² of hotel space with a clean and cost-effective heating and cooling production system.
P3 Logistic Parks, a major player in logistics real estate in Europe, and Poste Immobilier entrusted Accenta with replacing the heating system of a 19,000 m² warehouse located in Grand-Couronne, near Rouen.
The Wonder Building is a large-scale project converting a former industrial brownfield into a state-of-the-art office building.
