The Energy Transition in St Helena, Ascension and Tristan da Cunha

Saint Helena, Ascension and Tristan da Cunha are strengthening their energy systems through focused investment in renewable energy and infrastructure resilience. On Saint Helena, the government has committed to achieving 100% renewable electricity, supported by key projects such as the Half Tree Hollow Solar Farm and large-scale battery storage systems. These initiatives aim to cut diesel use and improve energy independence. Ascension Island is exploring solar PV integration alongside energy efficiency upgrades, while Tristan da Cunha continues to rely on small-scale diesel generation, with long-term goals to transition to renewables. The islands remain entirely dependent on imports for critical minerals like lithium and cobalt, essential for solar panels and storage technologies. Opportunities exist to expand solar and wind generation, supported by UK aid and development frameworks. Although no active seabed mineral exploration is underway within their Exclusive Economic Zones (EEZs), offshore renewable potential remains an area for future study. Despite high infrastructure costs and logistical challenges, these territories are advancing steadily towards greater energy resilience and alignment with energy transition efforts.