Solar (photovoltaic) panels cumulative capacity in Tonga
Tonga: Solar (photovoltaic) panels cumulative capacity was 0.0151 gigawatts in 2025. ◆ Volatile
Solar (photovoltaic) panels cumulative capacity in Tonga, 2008–2025
Source: IRENA (2026) – processed by Our World in Data. Measured in gigawatts.
Analysis
The most recent figure for solar (photovoltaic) panels cumulative capacity in Tonga is 0.0151 gigawatts, measured in 2025. That is the highest value across all 18 years on record.
The figure is up 1.6% on the previous year and up 331.6% over ten years.
Over the whole period, solar (photovoltaic) panels cumulative capacity in Tonga peaked at 0.0151 gigawatts in 2025 and was at its lowest, 0 gigawatts, in 2008.
Tonga ranks 156th of 199 countries on this measure, in the bottom quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Solar (photovoltaic) panels cumulative capacity in Tonga, year by year
| Year | gigawatts | Change |
|---|---|---|
| 2008 | 0 gigawatts | — |
| 2009 | 0 gigawatts | +0.0% |
| 2010 | 0 gigawatts | +0.0% |
| 2011 | 0.0002 gigawatts | +1636.4% |
| 2012 | 0.0019 gigawatts | +879.6% |
| 2013 | 0.0025 gigawatts | +32.3% |
| 2014 | 0.0025 gigawatts | +0.2% |
| 2015 | 0.0035 gigawatts | +41.5% |
| 2016 | 0.0043 gigawatts | +22.1% |
| 2017 | 0.0065 gigawatts | +50.6% |
| 2018 | 0.0066 gigawatts | +1.9% |
| 2019 | 0.0066 gigawatts | +0.0% |
| 2020 | 0.0066 gigawatts | +0.0% |
| 2021 | 0.0066 gigawatts | +0.0% |
| 2022 | 0.0139 gigawatts | +110.9% |
| 2023 | 0.0147 gigawatts | +5.8% |
| 2024 | 0.0149 gigawatts | +1.7% |
| 2025 | 0.0151 gigawatts | +1.6% |
Tonga compared with similar countries
- Tonga's 0.0151 gigawatts is below the median for upper middle income countries, which is 0.474 gigawatts, 3% of the median. (52 countries reporting)
- Tonga's 0.0151 gigawatts is below the median for East Asia & Pacific, which is 0.1229 gigawatts, 12% of the median. (35 countries reporting)
Biggest year-on-year movements
Years where Solar (photovoltaic) panels cumulative capacity in Tonga changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2011 | +1636.4% | 0 gigawatts | 0.0002 gigawatts |
| 2012 | +879.6% | 0.0002 gigawatts | 0.0019 gigawatts |
| 2022 | +110.9% | 0.0066 gigawatts | 0.0139 gigawatts |
| 2017 | +50.6% | 0.0043 gigawatts | 0.0065 gigawatts |
| 2015 | +41.5% | 0.0025 gigawatts | 0.0035 gigawatts |
| 2013 | +32.3% | 0.0019 gigawatts | 0.0025 gigawatts |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 0 gigawatts | 0 gigawatts | 0 gigawatts | 2 |
| 2010s | 0.0034 gigawatts | 0 gigawatts | 0.0066 gigawatts | 10 |
| 2020s | 0.012 gigawatts | 0.0066 gigawatts | 0.0151 gigawatts | 6 |
Countries ranked near Tonga
More energy & mining data for Tonga
- Fossil fuel consumption by fuel, per unit of GDP 0 terawatt-hours per US$ of GDP (2024)
- Primary energy use, annual growth rate 8.74 % change on previous year (2024)
- Coal consumption, per capita 0 terawatt-hours per person (2024)
- Coal consumption, per unit of GDP 0 terawatt-hours per US$ of GDP (2024)
- Primary energy use, per unit of GDP 0 terawatt-hours per US$ of GDP (2024)
- Primary energy use, per capita 0 terawatt-hours per person (2024)
- Coal production, per capita 0 terawatt-hours per person (2024)
- Coal production, per unit of GDP 0 terawatt-hours per US$ of GDP (2024)
- Fossil fuel consumption by fuel, per capita 0 terawatt-hours per person (2024)
- Fuel imports 16.4% (2023)
Frequently asked questions
- What is solar (photovoltaic) panels cumulative capacity in Tonga?
- Solar (photovoltaic) panels cumulative capacity in Tonga was 0.0151 gigawatts in 2025, according to IRENA (2026) – processed by Our World in Data.
- What is the highest solar (photovoltaic) panels cumulative capacity recorded in Tonga?
- The highest recorded value was 0.0151 gigawatts in 2025.
- What is the lowest solar (photovoltaic) panels cumulative capacity recorded in Tonga?
- The lowest recorded value was 0 gigawatts in 2008.
- How does Tonga rank for solar (photovoltaic) panels cumulative capacity?
- Tonga ranks 156th out of 199 countries with data for 2025.
- Is solar (photovoltaic) panels cumulative capacity rising or falling in Tonga?
- Over the last ten years it is up 331.6%. The long-run trend across the full record is volatile.
- Where does this Tonga data come from?
- The figures come from IRENA (2026) – processed by Our World in Data, published as part of Solar (photovoltaic) panels cumulative capacity. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 18 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Solar photovoltaic (on-grid) electricity installed capacity, measured in gigawatts.