The Rhodes Grid Connection is a planned offshore wind transmission link intended to enable export of power from proposed floating offshore wind developments in the southern Rhodes area into the Hellenic transmission system. Development and system planning are being advanced by the Greek TSO (IPTO...
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On 27 February 2026 it was reported that IPTO had officially revised the budget for the Dodecanese Interconnection, which covers the island links including Rhodes, increasing the estimated cost by €900 million to a new total of €2.95 billion and postponing the targeted completion date for both the Dodecanese and Northern Aegean interconnections from 2029 to 2030 due to sharply higher submarine cable prices.
On 27 February 2026, PVknowhow, citing an official announcement by IPTO, reported that the Dodecanese island interconnection project, which covers the Dodecanese links including the Rhodes area grid connection, has been postponed by one year, shifting the planned completion date from 2029 to 2030. The article notes that soaring international prices for specialised submarine cables have driven a €900 million cost increase, raising the total budget estimate for the Dodecanese interconnection to €2.95 billion and forcing IPTO to revise its ten‑year island interconnection schedule.
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IPTO Dodecanese interconnection, Dodecanese interconnection (Kos–Rhodes–Karpathos), Dodecanese interconnection
The European Investment Bank signed a long-term loan agreement with IPTO on 5 February 2026, providing €1.9 billion of debt financing for the IPTO Dodecanese Interconnection, which includes the Kos–Rhodes–Karpathos links, a static compensator at Rhodes, new GIS substations, and related submarine and fibre-optic cables, to connect the islands to the Hellenic Electricity Transmission System and enable greater renewable energy integration.
By 20 January 2026, Greek infrastructure outlet Ypodomes reported that the major project for the electrical interconnection of the Dodecanese islands, which includes the Kos–Rhodes–Karpathos links forming the basis for the Rhodes Grid Connection, is among the largest projects currently up for tender in Greece. The Dodecanese interconnection is highlighted as one of the country’s top three infrastructure tenders, with an individual project cost exceeding €1 billion and with award and contract signing expected during 2026.
In 2023, IPTO submitted the Environmental Impact Study for the Dodecanese interconnection, which includes the Kos–Rhodes–Karpathos links, to the Greek Ministry of Environment and Energy for approval, marking a key permitting step for the Rhodes Grid Connection and wider Dodecanese island grid links.
In summer 2023, IPTO commissioned studies and reconnaissance oceanographic–bathymetric surveys for the Dodecanese island interconnections, with seabed survey work initiated along the Corinth–Kos and Kos–Rhodes subsea cable routes that will link the islands to the Hellenic Electricity Transmission System. These geophysical surveys, contracted through tenders concluded in 2023, are currently underway as part of the preparatory work for the Dodecanese investment programme to be delivered by the end of the decade.
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