Saint Helena, Ascension and Tristan da Cunha has 3 power plants in this atlas, with 9 MW of reported capacity (reported for 2 of them). The largest listed plant is Rupert's Power Station (8 MW, oil; current status unverified). By number of records the most common technologies are oil and wind. Grid operators listed here include Connect Saint Helena.
Reported capacity is the rated size of the listed installations, not electricity being produced now. Source dates and coverage differ, so newer facilities may be absent and historical records may remain.
Grid operators and electricity market in Saint Helena, Ascension and Tristan da Cunha
Island systemSmall isolated grid
Diesel, wind and solar on St Helena; Ascension and Tristan da Cunha have their own generators.
GenerationLocal power station
TransmissionIsland grid
DistributionIsland utility
CustomersSet tariffs
Who regulates
Electricity rules follow the United Kingdom, with local oversight by the territory’s government.
No power exchange: the utility produces or buys electricity and sells it at set tariffs.
Regional grid
Not part of a larger synchronous grid or regional power pool.
What does “Island system” mean?
A small grid that is not connected to a larger network. One utility typically runs generation and distribution, often relying on imported fuel, with solar and batteries increasingly added.
Saint Helena, Ascension and Tristan da Cunha is a statistical territory containing separate island systems. Connect’s entry applies to Saint Helena only.
References reviewed 2026-09-29. Logos are each organisation’s own site icon, shown to identify it. Selected organisations, not an exhaustive list of licence holders.
Saint Helena, Ascension and Tristan da Cunha is in Western Africa. Its coastal or island geography provides a different setting for electricity infrastructure from inland systems. This profile connects country reference information with the historical station inventory and reported electricity generation.
Capital
Jamestown
Languages
English
Region
Western Africa
Geographic reference: Countries geographic database (ODbL). Boundaries and names are for orientation; language listings are introductory, not exhaustive. Banner map: Natural Earth boundaries (public domain) with this atlas’s station records.
The source inventory contains 3 records for Saint Helena, Ascension and Tristan da Cunha. Select a fuel in the map to explore where its stations are located, then open a record to inspect reported capacity and provenance.
Inventory coverage
3 source records. 0 reported operational in their source snapshot; this is not live status.
Browse 3 source records, ordered by reported capacity. Ownership and operating status describe the source snapshot; they may have changed. Missing information is shown explicitly.
