About What is the Tonga Energy Storage System
A solar-plus-storage project combining 300kW of PV and a 2MWh battery energy storage system (BESS) has been installed in the Polynesian archipelago nation of Tonga. The project on the island of Vava’u was commissioned by Tonga Power Limited (TPL), the country’s sole electric utility, on 14 March.
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About What is the Tonga Energy Storage System video introduction
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6 FAQs about [What is the Tonga Energy Storage System]
How will Tonga move away from fossil fuels?
This project aims to help Tonga move away from fossil fuels and shift to renewables. The project will deliver utility-scale storage systems to provide base load response and grid stability, paving the way for more renewable energy integration in the main island, while green mini-grids will be installed in the outer islands.
How much energy does Tonga generate?
It accounts for 90 percent of its electricity generation. The Government of Tonga has formulated targets to transform its energy sector by achieving a 50 percent share of renewables in the country’s energy generation mix by 2020 and 70 percent by 2030.
How can Tonga transform its energy sector?
The Government of Tonga has formulated targets to transform its energy sector by achieving a 50 percent share of renewables in the country’s energy generation mix by 2020 and 70 percent by 2030. However, achieving these targets require catalytic investments to transform the country’s energy infrastructure.
Why is energy security important in Tonga?
Energy security is an ever-present concern for Tonga. To address the dual challenges of climate change and energy security, the Government of Tonga confirmed the Renewable Energy Act in 2008.
Can Tonga's power infrastructure stand up against cyclones & storms?
To address the dual challenges of climate change and energy security, the Government of Tonga confirmed the Renewable Energy Act in 2008. Investment from ADB and other partners is making sure Tonga’s power infrastructure can better stand up under the cyclones and storms that are a part of life in the Pacific.
How will Trep help Tonga?
TREP will help Tonga rapidly move from its heavy dependence on imported fossil fuels for power generation (about 90%) to using clean and renewable energy resources that are low carbon and climate resilient.


