The Tonga Outer Island Renewable Energy Project (OIREP) will construct Solar Photovoltaic (PV) power plants on 8 outer islands. The "on-grid" portion will be allocated to Ha''apai and ''Eua,
Producing energy since August this year, and providing power for up to 10,336 households, the Solar Farm is helping The Government of Tonga pursue its National Energy
The Tonga Renewable Energy Project (TREP) has brought electricity to every home on ''O''ua Island, Ha''apai—including all households led by women. In May 2025, a final review
OIREP''s focus was installation of solar energy capabilities to nine outer islands of Tonga, with the aim of increasing the reliability, efficiency and affordability of power on these islands.
The project will save approximately 41,000 liters of diesel annually; enhance households economic productivity; increases accessibility to healthy, reliable water and foods supply as
Prime Minister of Tonga today announced the official launch of the 6-MW power purchase agreement (PPA) based Tongatapu Solar Farm located at Fualu, Tongatapu, which
Businesses are seeking innovative models that allow them to utilise their solar power and sell any surplus to Tonga Power Limited (TPL), along with solutions to mitigate the impact of TPL''s
Objectives: To discuss: The recent installation of solar mini-grid systems on three remote islands in Tonga: Niuafo''ou, O''ua, and Mo''unga''one. And some case studies from Other Pacific Island
Our main source of renewable energy is currently from solar generation and wind generation, but we are also looking into other renewable energy sources that are reliable and sustainable here
Prime Minister of Tonga today announced the official launch of the 6-MW power purchase agreement (PPA) based Tongatapu Solar Farm located at Fualu, Tongatapu, which has supplied electricity to over 10,336
All 84 households on Hunga Island, including seven female-headed homes, are now connected to a new solar-powered microgrid, marking a significant milestone in Tonga''s

Producing energy since August this year, and providing power for up to 10,336 households, the Solar Farm is helping The Government of Tonga pursue its National Energy Roadmap plans to see up to 70% of Tongatapu’s electricity generation sourced from renewables by the end of 2025.
Renewables like solar are a significant means for Tonga to expand energy access, stabilize power grids as well as reduce pollution. Considering the shortage of solar expertise and finances for countries like Togan, the role of independent power producers and the practice of PPA provide solid support to smooth the way for solar deployment.
This means that little more than 30,000 people are spread across 35 islands, presenting acute issues in terms of the provision of modern infrastructure. At OIREP commencement, the ADB estimated that 89% of all households across Tonga had access to electricity.
Australia also has a long history of engagement in relation to helping secure Tonga’s outer island energy needs. In the early 2000s, Australia funded the Ha’apai Outer Islands Electrification project (HOIEP), which involved the installation of diesel-powered generators and electrical reticulation on four islands in the Ha’apai group.
As Hu'akavameiliku, Prime Minister of Tonga said at the ceremony: "The successful completion of the Sunergise's 6MW Independent Power Producer solar generation system today, demonstrates the major role renewable energy independent power producers play towards achieving our 70% target by [the] end of [the] year 2025."
This solar project was completed under the partnership between Sunergise New Zealand Limited and Tonga Power Limited with support from the Asian Development Bank (ADB). Sunergise led the construction and meanwhile united local Tongan civil, mechanical and electrical sub-contractors to the team.
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Tonga Energy Storage Container Power Station Design Plan
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