Tonga Renewable Energy Project under the Pacific Islands Renewable Energy Investment Program

Tonga Renewable Energy Project under the Pacific Islands Renewable Energy Investment Program

  • Status Under implementation
  • Date approved 20 Oct 2018 at B.21
  • Est. completion 30 Nov 2024
  • ESS Category Category B

Shifting electricity production in Tonga to a low-carbon, climate resilient path.

Tonga is the second most climate vulnerable country in the world. Like many other Small Island Developing States in the Pacific, Tonga’s energy source is almost exclusively imported diesel. 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. However, achieving these targets require catalytic investments to transform the country’s energy infrastructure.

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. While stabilising the grid, this project will particularly address the intermittency of variable renewable energy sources, thus laying the foundation for private sector investments in renewable energy in Tonga. 

The project has an estimated lifespan of 25 years.

Total project value


Tonnes of emissions avoided




Result areas

Project timeline


17 Mar 2017 - 583 days

Concept note received

17 Mar 2017

Funding proposal received

18 Aug 2017

Cleared by GCF Secretariat

26 Apr 2018

Cleared by iTAP

08 Jun 2018


20 Oct 2018 - 399 days

Approved by GCF Board

20 Oct 2018

Legal opinion on AE's Internal Approval

13 Mar 2019

FAA executed

06 Sep 2019

Under implementation

22 Nov 2019 - 1,707 days so far

FAA effective

22 Nov 2019

Disbursement - USD 24,324,000

13 Dec 2019

Disbursement - USD 5,576,000

06 Oct 2022

To be completed

30 Nov 2024 - 130 days to go

One region

  • Asia-Pacific

One country

One priority group

  • Small Island Developing States
  • Financing
    • Private sector
    • Public sector
  • Size
    • Micro
    • Small
    • Medium
    • Large

GCF financing100% disbursed

GrantUSD 29,900,000
Total GCF Financing
USD 29,900,000


Co-FinancingGrantUSD 3,000,000
Co-FinancingGrantUSD 2,500,000
Co-FinancingGrantUSD 12,200,000
Total Co-Financing
USD 17,700,000

GCF Contacts

General media inquiries

GCF Communications
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Request for information

GCF Information Disclosure
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Project complaints and grievances

GCF Independent Redress Mechanism (IRM)
Phone +82 32 458 6186 (KST)
File a complaint

Integrity issues

GCF Independent Integrity Unity (IIU)
Phone +82 32 458 6714 (KST)
Send e-mail

Accredited Entity

Asian Development Bank
Mr. Christian Ellermann

Senior Climate Change Specialist
More contacts

National Designated Authority

Ministry for Meteorology, Energy, Information, Disaster Management, Environment, Climate Change and Communications (MEIDECC)
Mr. Sione ‘Akau’ola Primary
Chief Executive Officer (CEO)
Phone (+676) 28170
Ms. Luisa Malolo Secondary
Director of Climate Change, MEIDECC