STOLECT: Electricity Storage Technology for Energy Transition
STOLECT develops a large-scale electricity storage technology that enables the construction of 100% renewable energy grids by converting variable renewable electricity into controllable electricity. This technology is an essential link in decarbonising energy mixes and supporting the energy transition of electricity grids and industrial facilities.
At the same time, STOLECT offers independent energy mix modelling and sizing services to support industrial players and energy producers in their energy transition.
Our technology and its uses
A key solution for large-scale electricity storage
STOLECT is developing an innovative electricity storage process based on the reversible conversion of electrical energy into thermal energy, designed to be sustainable, competitive and scalable. Its ability to provide controllable, carbon-free electricity makes it an essential asset for the energy transition.
The conversion is achieved using turbomachinery that circulates air through the system.
- During the storage phase, a compressor converts electrical energy from the grid into heat by compressing air. This heat is then stored in natural rock (basalt) or recycled ceramics.
- During the release phase, the materials transfer their energy to the circulating air, which then drives a turbine connected to an alternator. The recovered energy is fed back into the electricity grid.
This design has many advantages:
Learn more about the technologyExamples of use
Storage, coupled with renewable production, provides controllable and renewable electricity, which is essential for reducing dependence on fossil fuels. Storage is key to supporting the integration of renewable energies such as wind and solar power around the world.
Large-scale storage makes it possible to:
- Provide controllable, carbon-free electricity
- Ensure grid stability
- Make use of surplus production
- Take advantage of price fluctuations
Autonomous electrical grids
STOLECT supports renewable energy production by storing surpluses and ensuring the autonomy of non-interconnected areas, such as islands or isolated regions. STOLECT has a major impact in reducing pollution and costs generated by means of production such as generators, while improving the energy independence of these areas.
Renewable electricity producers
STOLECT enables renewable energy plant operators to optimise their production profile, avoiding surpluses and low prices on the electricity market. This allows them to shift or smooth out part of their production in order to sell it at the most advantageous time.
STOLECT also optimises connection power, which is useful for applications such as wind repowering.
Industriels électro-intensifs
Les industriels ayant une forte consommation électrique peuvent être intéressés par l'optimisation de leur consommation en fonction des productions renouvelables et des prix de marché, afin de consommer une électricité la moins carbonée et la moins chère possible. Il est également indispensable pour certains industriels de sécuriser leur approvisionnement face aux coupures dans des zones où le réseau électrique est plus fragile.
Our services: energy studies and decarbonisation
Your energy transition challenges
You face constraints and structural choices in responding to environmental, societal, economic and regulatory challenges.
STOLECT offers analysis and sizing services tailored to your needs to
- Optimise your energy costs and strengthen your competitiveness
- Reduce your carbon footprint and increase your company's resilience
Our approach and expertise
STOLECT offers a comprehensive and integrated approach for all types of consumers and producers:
Analyse and understand your energy consumption
The first step is to assess your energy needs and the specific constraints of a site. STOLECT strives to make the most of existing data (consumption data, satellite meteorological data, open data, etc.).
Design and build your energy mix
By integrating renewable and storage solutions, with or without a STOLECT storage system, we are able to simulate different energy trajectories tailored to your environmental and financial objectives.
Structure your project, its economic model and its financing
STOLECT carries out detailed studies of the project and its integration into the chosen site, but also identifies and mobilises the appropriate financiers
Implement your transition path
STOLECT supports you throughout the implementation of your strategy and assesses the real impact of the actions taken
Your benefits
Renewables and storage enable you to secure your energy bills, reduce your production costs while reducing your carbon footprint and meeting your regulatory obligations. You can build a more resilient energy mix that is less dependent on energy price fluctuations.
Would you like to know the profitability of an installation or build an optimal energy mix?
Contact us for an initial free assessment or a personalised quote based on your needs.
The company
STOLECT's ambition is to create a new industrial sector in the field of large-scale electricity storage, drawing on the expertise of French and European partners.
STOLECT relies on a team with proven experience in innovation and project development in the energy sector and in-depth knowledge of the electricity market players, as well as a network of industrial partners with strong expertise in their respective fields.
To benefit from the expertise of its partners and accelerate the implementation of the technology, STOLECT will rely on their existing production tools before developing its own production facilities in a second phase.
The team
Jean-François Le Romancer
José Da Silva
Gauthier Preux
Amélie Pouplin
Denis Véron
Pascal Renimel
The strategic committee
FABIENNE HERLAUT
FRÉDÉRIC DE MANEVILLE
ÉRIC HAYAT
News
[Who's Who Leaders - Le Figaro] Stolect, the French start-up reinventing electricity storage to promote energy sovereignty
A look back at the 2025 Pioneer Awards
WETEX 2025 - STOLECT ont the French Pavilion from the 30/09 to the 02/10
Pioneers Forum 2025 on 8 October 2025 in Brussels
STOLECT at the Solar & Storage Exhibition on 5th and 6th November
