# Canary Islands power interconnection, storage & grid upgrade > Live situation record from CLSTR: https://clstr.news/situations/canary-islands-electricity-interconnection > Updated: 2026-07-31T07:26:19.000Z. Sources: 12. Developments: 5. The 36 km, 66 kV double‑circuit submarine cable linking Tenerife and La Gomera entered service on 1 July 2026, unifying the islands’ grids and enabling bidirectional power flow. The link, funded partly by NextGeneration EU and costing €177.5 million, raised network availability to over 98 % and helped lift renewable capacity from about 23 % in 2021 to nearly 30 % by 2025, with renewables meeting roughly one‑fifth of demand (≈21 %). In 2025 the archipelago recorded its highest renewable generation, driven by a 14 % jump in solar photovoltaic output and a modest wind contribution (15.3 % of the renewable mix). Overall renewable generation rose by 1.03 % despite fossil fuels still supplying 79.2 % of total electricity. The new inter‑island link allowed La Gomera’s wind farms to meet the island’s entire demand on several days in July, injecting more than 9 MW into the grid and improving supply stability. The €1 billion pumped‑hydro project at Güímar (200 MW, ~3 200 MWh storage) approved in July 2026 will operate by the mid‑2030s, complementing other storage concepts. A second firm‑power tender earmarks 707.5 MW for the Canary Islands to meet 2031 targets. Minister Mariano Hernández Zapata seeks to secure €100 million of Next Generation EU funding for renewables and plans an offshore‑wind tender before year‑end, advancing the archipelago’s decarbonisation, resilience and reduced fossil‑fuel reliance. ## Timeline ### 2026-07-31: Canary Islands renewable electricity share rises as solar output surges Canary Islands' renewable electricity hits a record in 2025, driven by a 14% solar boost; new inter‑island link lets La Gomera meet full demand with wind on several July days. 4 sources. https://clstr.news/cluster/canary-islands-renewable-electricity-share-rises-as-solar-output-surges ### 2026-07-24: Canary Islands strengthen power grid with new Tenerife‑La Gomera submarine link Red Eléctrica’s €1.8 bn upgrade of the Canary Islands grid includes a new €177.5 m Tenerife‑La Gomera submarine cable, boosting resilience, renewable integration and supply security. 2 sources. https://clstr.news/cluster/canary-islands-strengthen-power-grid-with-new-tenerifela-gomera-submarine-link ### 2026-07-14: Canary Islands push forward 1‑billion‑euro Güímar pumped‑hydro plant and wider power‑capacity programmes Spain backs a €1 bn Güímar pumped‑hydro plant in Tenerife and a €820 MW power‑capacity tender for the Canary Islands, while regional officials seek to extend €100 m EU funds and launch offshore‑wind tenders. 6 sources. https://clstr.news/cluster/spain-approves-1-billion-pumpedstorage-plant-in-gmar-tenerife ### 2026-07-01: La Gomera–Tenerife Electricity Interconnection Begins Operation La Gomera and Tenerife’s new €145 million submarine electricity link, delivering 50 MW, ends La Gomera’s isolation and boosts grid security and renewable integration. 2 sources. https://clstr.news/cluster/la-gomeratenerife-electricity-interconnection-begins-operation ### 2026-06-15: Spain authorises unified electricity grid for Tenerife and La Gomera Spain's government has approved a €100 million submarine cable linking Tenerife and La Gomera, creating a single electricity grid on 1 July to boost efficiency, lower costs and improve supply security. 2 sources. https://clstr.news/cluster/spain-authorises-unified-electricity-grid-for-tenerife-and-la-gomera --- Cite as: Canary Islands power interconnection, storage & grid upgrade. CLSTR, https://clstr.news/situations/canary-islands-electricity-interconnection