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August 31, 2021

Akuo Energy-Tonga 2 – Battery Energy Storage System, Tonga

By Carmen

The Akuo Energy-Tonga 2 – Battery Energy Storage System is a 6,000kW energy storage project located in Tongatapu, Tonga. The rated storage capacity of the project is 23,400kWh.

The project was announced in 2019 and will be commissioned in 2021.


The Akuo Energy-Tonga 2 – Battery Energy Storage System is being developed by Akuo Energy. The project is owned by Akuo Energy (100%).

The key applications of the project are peak shaving and load shifting.

Contractors involved

Akuo Energy is the owner. Akuo Energy is the developer. Akuo Energy is the technology provider for the project.

Akuo Energy is the EPC contractor for the project.

Additional information

Akuo, a global renewable energy independent power producer and developer, and Tonga Power Limited signed an Engineering, Procurement and Construction (EPC) contract for a 23.4 MWh / 6MW Battery Energy Storage System (BESS) project which set to become the largest storage project in the South Pacific (excluding Hawaii).

About Akuo Energy

Akuo Energy SAS (Akuo Energy) is a renewable energy company that develops, finances, builds and operates renewable energy power plants. The company offers services such as project management, engineering, procurement and construction; and operation and maintenance of renewable energy power plants. It generates power using renewable energy sources such as hydro energy, ocean thermal energy conversion, biomass, wind energy and solar energy. The company has operations in the UAE, Turkey, Indonesia, Luxembourg, the US, Uruguay, Croatia, Poland, Bulgaria, Australia, Dominican Republic and Mongolia. Akuo Energy 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.

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