The Gemasolar Thermosolar Plant – Thermal Energy Storage System is a 19,900kW energy storage project located in Seville, Fuentes de Andalucía, Spain.

The thermal energy storage project uses molten salt as its storage technology. The project was commissioned in 2011.


The Gemasolar Thermosolar Plant – Thermal Energy Storage System was developed by Torresol Energy Investments. The project is owned by MASDAR (UK) (40%) and SENER Grupo de Ingenieria (60%).

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

Contractors involved

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MASDAR (UK), SENER Grupo de Ingenieria and Torresol Energy Investments have delivered the project.

Additional information

The molten salt storage tank permits independent electrical generation for up to 15 hours without any solar feed. The prolongation of the plant’s operating time in the absence of solar radiation and the improvement in efficiency of the use of the heat from the sun makes Gemasolar’s output much higher than that which is delivered by other technologies in a facility with the same power. The notable increase in the plant’s power efficiency guarantees electrical production for 6,500 hours a year, 1.5 to 3 times more than other renewable energies. The plant will thus supply clean, safe power to 25,000 homes and reduce atmospheric CO2 emissions by more than 30,000 tons a year.

About Torresol Energy Investments

Torresol Energy Investments SA (Torresol Energy) a subsidiary of SENER Grupo de Ingenieria SA, is a solar energy service provider that offers promotion, investment, maintenance and operation of solar energy projects. The company’s services include development, operation and maintenance of solar plants, cutting-edge technological solutions, central tower, salt receiver and heliostat technology and cylindrical-parabolic collector technology services. It also provides plants operations and management services and solar power plants construction and maintenance services. The company operates in Seville, Vizcaya, Cadiz, Madrid and others. Torresol Energy is headquartered in Getxo, Spain.


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.