Tonga Electricity Mix
Tonga generated 14.3% of its electricity from renewable sources in 2024, below the world average of 33.8%. Each kilowatt-hour produced emitted about 571 grams of CO₂.
Data year 2024 · Source: Ember and Energy Institute via Our World in Data
How much electricity in Tonga comes from renewables?
Renewable sources produced 14.3% of the electricity generated in Tonga in 2024. The world average was 33.8% in 2025. That is up from 0% in 2000. That ranks Tonga 146th of 210 countries and territories by renewable share.
Electricity mix by source
Oil is the largest source of electricity in Tonga, at 85.7% of generation, followed by solar at 14.3%. Fossil fuels together supplied 85.7%.
Carbon intensity of electricity
Generating one kilowatt-hour of electricity in Tonga emitted about 571 grams of CO₂ in 2024, 25% above the world average of 458 g. At that rate, a business using 10,000 kWh a year would be responsible for roughly 5,714 kg of CO₂ from electricity.
This is an estimate based on the generation mix. For a formal carbon report, use the grid factor published by the national energy or environment agency. Our guide to emission factors explains the difference.
How Tonga compares
Countries closest to Tonga when ranked by renewable share of electricity. See the full ranking, or the CO₂ emissions of Tonga.
| # | Country | Renewables | Low-carbon | g CO₂/kWh |
|---|---|---|---|---|
| 144 | Seychelles | 15.9% | 15.9% | 556 |
| 145 | Kazakhstan | 14.9% | 14.9% | 805 |
| 146 | Tonga | 14.3% | 14.3% | 571 |
| 147 | South Africa | 13.6% | 17.8% | 699 |
| 148 | Dominica | 13.3% | 13.3% | 600 |
Frequently asked questions
What share of electricity in Tonga is renewable?
14.3% in 2024. That is up from 0% in 2000. Counting nuclear as well, 14.3% of electricity came from low-carbon sources.
What is the main source of electricity in Tonga?
Oil is the largest source of electricity in Tonga, at 85.7% of generation, followed by solar at 14.3%.
How clean is electricity in Tonga?
Generating one kilowatt-hour emitted about 571 grams of CO₂ in 2024, 25% above the world average of 458 g.
Is renewable electricity growing in Tonga?
The renewable share has risen by 14.3 percentage points, from 0% in 2000 to 14.3% in 2024.
About the data. Shares are percentages of the electricity generated inside the country in a year. Renewables are hydro, wind, solar, bioenergy and other renewable sources. Low-carbon adds nuclear. The latest year differs between countries and is shown on each page. Carbon intensity is an estimate of the CO₂ emitted per kilowatt-hour generated, including emissions over the life of each power source.
Source: Ember and the Energy Institute Statistical Review of World Energy, processed by Our World in Data and used under the CC BY 4.0 licence.
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