Work out your Tonga electricity emissions
= 28.57 tonnes CO2e in 2024 (Scope 2 (location-based))
Each kWh × 0.571 kg CO2e, the 2024 grid average for Tonga (Ember).
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Tonga electricity emission factor by year
| Year | g CO2e per kWh | kg CO2e per kWh | Change |
|---|---|---|---|
| 2024 | 571 | 0.571 | 0.0% |
| 2023 | 571 | 0.571 | -8.6% |
| 2022 | 625 | 0.625 | +9.4% |
| 2021 | 571 | 0.571 | 0.0% |
| 2020 | 571 | 0.571 | 0.0% |
| 2019 | 571 | 0.571 | 0.0% |
| 2018 | 571 | 0.571 | 0.0% |
| 2017 | 571 | 0.571 | -14.3% |
| 2016 | 667 | 0.667 | +11.1% |
| 2015 | 600 | 0.600 | 0.0% |
| 2014 | 600 | 0.600 | 0.0% |
| 2013 | 600 | 0.600 | 0.0% |
| 2012 | 600 | 0.600 | 0.0% |
| 2011 | 600 | 0.600 | 0.0% |
| 2010 | 600 | 0.600 | 0.0% |
| 2009 | 600 | 0.600 | 0.0% |
| 2008 | 600 | 0.600 | 0.0% |
| 2007 | 600 | 0.600 | 0.0% |
| 2006 | 600 | 0.600 | 0.0% |
| 2005 | 600 | 0.600 | 0.0% |
| 2004 | 600 | 0.600 | -20.0% |
| 2003 | 750 | 0.750 | 0.0% |
| 2002 | 750 | 0.750 | 0.0% |
| 2001 | 750 | 0.750 | 0.0% |
| 2000 | 750 | 0.750 | – |
Lifecycle emissions per kWh of electricity generated in the country (g CO2e per kWh). Excludes imports and grid losses.
What Tonga's electricity is made from
In 2024, Tonga generated 0.1 TWh of electricity. 86% came from fossil fuels, which is what drives the factor up or down from year to year.
| Source | Share of generation, 2024 |
|---|---|
| Other Fossil | 85.7% |
| Solar | 14.3% |
Worked example
Take an office in Tonga using 50,000 kWh a year. 50,000 kWh × 0.571 kg CO2e = 28.6 tonnes CO2e, reported as Scope 2 (location-based).
How to report it
Multiply each site's electricity use in kWh, from its bills or meter readings, by the factor for the year. Report the result as location-based Scope 2. If the site buys renewable electricity backed by certificates recognised in Tonga, you can also show a market-based figure, but keep the location-based one alongside it.
UK companies with a site, warehouse or office here should use this factor for that site, not the UK grid factor. From April 2027, NHS suppliers on contracts over £5 million must report their global footprint, so overseas sites can no longer be left out. For your UK sites, use the UK government grid electricity factor.
In Carbon Recycling, set the site's country to Tonga and its electricity is reported with this factor automatically, while your UK sites stay on the UK government factor.
Related emission factors
- Nauru electricity: 600 g CO2e per kWh (2024)
- Solomon Islands electricity: 636 g CO2e per kWh (2024)
- American Samoa electricity: 611 g CO2e per kWh (2024)
- UK grid electricity (UK government factor)
- Electricity emission factors for every country
- Electricity CO2e calculator for any country, to compare Tonga with another country