Built 2026-09-19 (19 September 2026)

Saint Helena, Ascension and Tristan da Cunha Electricity: Generation Mix, Demand and Emissions

Saint Helena, Ascension and Tristan da Cunha generated 10.0 GWh of electricity in 2023, according to Ember. Other fossil was the largest source at 100.0%. Demand was 10.0 GWh and each kWh generated emitted 1,000 gCO2/kWh. These are annual statistics for 2023; they are compiled from national sources and are not real time.

Key Facts

  • Saint Helena, Ascension and Tristan da Cunha generated 10.0 GWh of electricity in 2023.
  • Other fossil supplied 100.0% of Saint Helena, Ascension and Tristan da Cunha's electricity in 2023.
  • Low carbon sources (nuclear and renewables) supplied 0.0% of Saint Helena, Ascension and Tristan da Cunha's generation in 2023.
  • The carbon intensity of Saint Helena, Ascension and Tristan da Cunha's electricity was 1,000 gCO2/kWh in 2023.
  • Saint Helena, Ascension and Tristan da Cunha's carbon intensity in 2023 was about the same as in 2000, at 1,000 gCO2/kWh.
  • Saint Helena, Ascension and Tristan da Cunha had the 210th highest electricity demand among the 213 countries with Ember data for 2023.

Key Figures, 2023

MeasureValueAs of / source
Total generation10.0 GWh2023 · Ember
Electricity demand10.0 GWh2023 · Ember
Demand per person1.89 MWh2023 · Ember
Net imports0 TWh2023 · Ember
Carbon intensity1,000 gCO2/kWh2023 · Ember
Power sector emissions0.01 MtCO22023 · Ember
Demand rank (countries with 2023 data)210 of 2132023 · Ember

Generation Mix, 2023

SourceGenerationShare
Other fossil 10.0 GWh 100.0%

Year by Year

Ember annual statistics, 2000 to 2023
Saint Helena, Ascension and Tristan da Cunha electricity generation by source, 2000 to 2023 Saint Helena, Ascension and Tristan da Cunha's electricity generation by main source from 2000 to 2023, in GWh. In 2023 the largest sources were other fossil at 10.0 GWh. 0 3 5 8 10 20002005201020152020
Saint Helena, Ascension and Tristan da Cunha's electricity generation by main source from 2000 to 2023, in GWh. In 2023 the largest sources were other fossil at 10.0 GWh.
Annual statistics through 2023, GWh
Saint Helena, Ascension and Tristan da Cunha electricity generation by source, 2000 to 2023
YearOther fossil
200010.0 GWh
200110.0 GWh
200210.0 GWh
200310.0 GWh
200410.0 GWh
200510.0 GWh
200610.0 GWh
200710.0 GWh
200810.0 GWh
200910.0 GWh
201010.0 GWh
201110.0 GWh
201210.0 GWh
201310.0 GWh
201410.0 GWh
201510.0 GWh
201610.0 GWh
201710.0 GWh
201810.0 GWh
201910.0 GWh
202010.0 GWh
202110.0 GWh
202210.0 GWh
202310.0 GWh
YearGenerationDemandCarbon intensity
2023 10.0 GWh 10.0 GWh 1,000 gCO2/kWh
2022 10.0 GWh 10.0 GWh 1,000 gCO2/kWh
2021 10.0 GWh 10.0 GWh 1,000 gCO2/kWh
2020 10.0 GWh 10.0 GWh 1,000 gCO2/kWh
2019 10.0 GWh 10.0 GWh 1,000 gCO2/kWh
2018 10.0 GWh 10.0 GWh 1,000 gCO2/kWh
2017 10.0 GWh 10.0 GWh 1,000 gCO2/kWh
2016 10.0 GWh 10.0 GWh 1,000 gCO2/kWh
2015 10.0 GWh 10.0 GWh 1,000 gCO2/kWh
2014 10.0 GWh 10.0 GWh 1,000 gCO2/kWh

Full year by year history for Saint Helena, Ascension and Tristan da Cunha, 2000 to 2023

Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of 2023. Ember's API does not cover Saint Helena, Ascension and Tristan da Cunha; these figures come from Ember's yearly data file.

Saint Helena, Ascension and Tristan da Cunha Electricity FAQ

What is the main source of electricity in Saint Helena, Ascension and Tristan da Cunha?

Other fossil was the largest source of electricity in Saint Helena, Ascension and Tristan da Cunha in 2023, supplying 100.0% of generation. Figures are Ember annual statistics.

How much electricity does Saint Helena, Ascension and Tristan da Cunha use?

Saint Helena, Ascension and Tristan da Cunha used 10.0 GWh of electricity in 2023, about 1.89 MWh per person.

How clean is Saint Helena, Ascension and Tristan da Cunha's electricity?

Generating a kilowatt hour of electricity in Saint Helena, Ascension and Tristan da Cunha emitted 1,000 gCO2/kWh in 2023, and low carbon sources supplied 0.0% of generation. That is 107% above the world average of 484 gCO2/kWh.