Global GridTonga's energy mix and electricity
🇹🇴 In 2024, Tonga generated 0.07 TWh of electricity. The largest source was oil and other fossil fuels at 86%, followed by solar (14%). In total, 14% came from low-carbon sources (nuclear and renewables) and 86% from fossil fuels.
On average, each kilowatt hour produced about 571 grams of carbon dioxide (COâ‚‚), above the world average of 458 grams in 2025.
Electricity demand was 0.07 TWh. Its electricity imports and exports were roughly in balance.
Since 2000, electricity generation has grown by 75%, from 0.04 TWh. The low-carbon share went from 0% to 14%. The biggest rise was in solar, from 0% to 14% of generation. The biggest fall was in oil and other fossil fuels, from 100% to 86%. Carbon intensity fell from 750 to 571 grams per kWh.
Live, hour-by-hour figures for Tonga are not connected yet. The dashboard shows its yearly figures, energy mix since 2000 and interconnector trade.
Energy mix in 2024
- Oil and other fossil fuels 86%
- Solar 14%
| Source | Share | Generated |
|---|---|---|
| Oil and other fossil fuels | 86% | 0.06 TWh |
| Solar | 14% | 0.01 TWh |
Energy security score
Vulnerable. It is not ranked because its power system is very small. The score shows how well a country could keep electricity affordable and on if fuel supplies were disrupted. It is based on 4 of the 5 measures.
| Measure | Score |
|---|---|
| Produces its own energy No reliable figure exists for Tonga, so this measure is left out and the other four count for more. | n/a |
| Variety of power sources How evenly generation is spread across nine sources. The largest, oil and other fossil fuels, made 86%. | 28 |
| Little reliance on imported power Tonga exported more electricity than it imported, so it scores full marks. | 100 |
| Low-carbon power Nuclear and renewables made 14% of generation. | 14 |
| Low gas and oil use Gas and oil made 86% of generation; the score is 100 minus that share. | 14 |
The five measures are weighted 30%, 20%, 20%, 15% and 15%. How the score works.
How it has changed
| Year | Generated | Low-carbon | Fossil | COâ‚‚ g/kWh |
|---|---|---|---|---|
| 2000 | 0.04 TWh | 0% | 100% | 750 |
| 2005 | 0.05 TWh | 0% | 100% | 600 |
| 2010 | 0.05 TWh | 0% | 100% | 600 |
| 2015 | 0.05 TWh | 0% | 100% | 600 |
| 2020 | 0.07 TWh | 14% | 86% | 571 |
| 2023 | 0.07 TWh | 14% | 86% | 571 |
| 2024 | 0.07 TWh | 14% | 86% | 571 |
Questions about Tonga's energy
What is Tonga's energy mix?
In 2024, Tonga's electricity came from oil and other fossil fuels 86% and solar 14%.
How much of Tonga's electricity is renewable?
14% of its electricity came from renewables in 2024 (solar 14%).
What is Tonga's main source of electricity?
Oil and other fossil fuels, which made 86% of its electricity in 2024.
How clean is Tonga's electricity?
About 571 grams of COâ‚‚ for each kilowatt hour in 2024, above the world average of 458 grams.
Does Tonga import electricity?
Its imports and exports were roughly in balance in 2024.
How secure is Tonga's energy supply?
Global Grid's energy security score for Tonga is 43 out of 100 (vulnerable). It looks at how much of its own energy it produces, how varied its power sources are, its reliance on imported power and its use of low-carbon power, gas and oil.
Other countries in Oceania
- 🇦🇺 Australia
- 🇳🇿 New Zealand
- 🇵🇬 Papua New Guinea
- 🇳🇨 New Caledonia
- 🇬🇺 Guam
- 🇫🇯 Fiji
- 🇵🇫 French Polynesia
- 🇦🇸 American Samoa
Sources: Ember yearly electricity data (CC BY 4.0), figures up to 2024. Ember's latest-year figures are first estimates and may be revised. TWh: terawatt hours (one billion kWh).