The Rooipunt Molten Salt Thermal Energy Storage System is a 150,000kW energy storage project located in Upington,Khara Hais, Northern Cape, South Africa. The rated storage capacity of the project is 1,800,000kWh.

The thermal energy storage project uses molten salt as its storage technology. The project was announced in 2016 and will be commissioned in 2021.


The Rooipunt Molten Salt Thermal Energy Storage System is being developed by Engie and SolarReserve. The project is owned by Engie (50%) and SolarReserve (50%).

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

Contractors involved

Engie and SolarReserve are the owners. Engie and SolarReserve are the developers.

Additional information

The Energy storage provides a non-intermittent electricity supply to meet South Africa’s peak demand requirements, day and night. Completely emission free, with no requirement for natural gas or oil back up. 750,000 tonnes of CO2 will be displaced each year. The Rooipunt project was developed in response to the South Africa Department of Energy’s Expedited Round (referred to as Round 4.5) call for CSP projects for the Renewable Energy Independent Power Producer Procurement Programme (REIPPPP).

About Engie

Engie SA (Engie) is an electric utility. It generates electricity using natural gas, coal, nuclear, hydro, wind, biomass and solar sources, and trades and sells that energy; supplies, distributes, trades and sells natural gas; and offers a comprehensive range of services related to the energy-efficiency. The company operates urban heating and cooling networks, and provides facility management, and other technical and management services. Engie serves customers in Latin America, North America, Europe, Africa, the Middle East, and Asia. It operates conventional and renewable facilities and has interests in various projects under development and construction stages across the world. Engie is headquartered in Paris, Ile-de-France, France.

About SolarReserve

SolarReserve LLC (SolarReserve) is a developer of utility-scale solar power projects and advanced solar thermal technology that offers clean fuel and renewable energy services. The company is headquartered in United States.


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.