The eLLO Solar Thermal Project (Llo) – Thermal Energy Storage System is a 9,000kW energy storage project located in Pyrenees-Orientales, Llo, Occitanie, France.

The thermal energy storage project uses others as its storage technology. The project was announced in 2014 and was commissioned in 2019.


The ELLO Solar Thermal Project (Llo) – Thermal Energy Storage System was developed by Caisse des Depots et Consignations and Suncnim. The project is owned by Caisse des Depots et Consignations (50%) and Suncnim (50%).

The key applications of the project are renewable capacity firming and renewable energy time shift.

Contractors involved

Caisse des Depots et Consignations and Suncnim have delivered the project.

About Caisse des Depots et Consignations

Caisse des Depots et Consignations (CDC) is a state-owned financial institution that performs in public interest on behalf of the government. The company makes long-term investments aimed to serve public interest and strengthen the economic scenario in France. CDC provides financial solutions such as savings deposits, loans and guarantees, export financing, and retirement savings funds, business growth support; manages public savings; develops public and private properties, and revives production of social and intermediate housing. It also offers insurance and infrastructure financing, modernizes public infrastructure and facilities, invests in tourism facilities, and supports digital environment, real estate services, and services to public authorities. The company has an operational presence throughout France, with presence in Europe, the Middle East, Africa, Asia, and the Americas. CDC is headquartered in Paris, France.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.