Dodecanese Interconnection Phase B: Rhodes (Thermal Power Station)–Karpathos is described in available planning material as a domestic island-link segment forming part of the wider Dodecanese islands interconnection programme. The broader Phase II of the Dodecanese programme is proposed for 2030 ...
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On 5 February 2025, the European Investment Bank (EIB) and Greek transmission system operator Independent Power Transmission Operator (IPTO) signed a financing agreement worth €1.9 billion to fund the IPTO Dodecanese interconnection, which includes the Rhodes–Karpathos link and will connect the islands of Kos, Rhodes and Karpathos to the Hellenic Electricity Transmission System, eliminating their electrical isolation and enabling more reliable and cleaner power supply with greater integration of renewable energy sources.
For the multi-project submarine cable framework covering the Dodecanese and North Aegean electrical interconnections, including the Rhodes–Karpathos link, IPTO moved into the final phase of its tender in January 2025 and received binding financial and technical offers from participating companies on 26 February 2025. The framework, with an initial budget of EUR 1.7 billion (plus VAT) and a six-year duration from contract signing, will be awarded on the basis of the most economically advantageous offer.
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Dodecanese Interconnection Phase B Rhodes-Karpathos, IPTO Dodecanese Interconnection (Rhodes–Karpathos), Dodecanese Phase B: Rhodes–Karpathos, Διασύνδεση Δωδεκανήσου Φάση Β: Ρόδος–Κάρπαθος, Rhodes–Karpathos interconnection
Independent Power Transmission Operator (IPTO) completed the marine surveys for the Dodecanese electrical interconnection, which will connect Kos, Rhodes and Karpathos to the mainland grid via Corinth in two phases. These marine surveys, covering the subsea cable routes and thus including the Rhodes (Thermal Power Station)–Karpathos Phase B segment, were finished in December 2024 as part of project development for the Dodecanese and Northeastern Aegean interconnections.
In October 2024, IPTO initiated Phase B of the framework agreement tender for the submarine cable interconnections of the Dodecanese and Northeastern Aegean islands, publishing the invitation for approved Phase A candidates to submit detailed technical and financial offers. This phase, which includes the cable works needed to connect Rhodes and Karpathos within the wider Dodecanese interconnection, was reported as being in progress in subsequent 2025 disclosures.
In April 2024, IPTO launched Phase A of a framework agreement tender by publishing a Call for Expressions of Interest for the submarine cable interconnections of the Dodecanese and Northeastern Aegean projects, covering cables that will link Kos, Rhodes and Karpathos to the mainland grid. This prequalification phase invited applications from candidates for participation in the cable interconnection works and was completed in July 2024.
Independent Power Transmission Operator (IPTO) submitted the Environmental Impact Assessment (EIA) for the overall Dodecanese electrical interconnection, which includes Phase B from Rhodes Thermal Power Station to Karpathos, to the Greek Ministry of Environment and Energy in December 2023 for environmental review and approval.
In IPTO’s Network Development Plan 2023–2032, presented in May 2023, the Dodecanese Interconnection is listed as a major transmission project with an expected commissioning date of 2028 and a total cost of about €1,451 million. This plan confirms the regulated status and schedule of the Dodecanese corridor that includes the Rhodes Thermal Power Station–Karpathos Phase B link.
On 3 February 2022, the Regulatory Authority for Energy (RAE) published Decision No. 611/2021 approving the Hellenic Electricity Transmission System development plan for 2021–2030, which requires that the interconnection of the Dodecanese and North Aegean islands be completed by the second half of 2029. This approval provides regulatory backing and timetable guidance for all Dodecanese links, including the Rhodes–Karpathos section.
In January 2021, IPTO (ADMIE) released its draft Ten‑Year Development Plan (TYNDP) 2022–2031, which highlighted island interconnections as over 80% of planned investment and explicitly included the interconnection of the Dodecanese Islands alongside other Aegean island links. This draft plan confirmed continued regulatory planning for the Dodecanese corridor that comprises the Rhodes–Karpathos section.
In 2018, IPTO submitted its recommended scheme for the Dodecanese interconnection to Greece’s Regulatory Authority for Energy (RAE), a prerequisite step for including the project in IPTO’s preliminary Ten‑Year Development Plan 2020–2029. The proposed scheme defined an "electric corridor" from the mainland via Corinth and Kos onward to Rhodes and Karpathos, thereby encompassing the future Rhodes–Karpathos (Rhodes Thermal Power Station–Karpathos) section.
Greece’s Islands Decarbonization Fund allocates EUR 790 million to the EUR 2 billion Dodecanese interconnection, including EUR 260 million specifically earmarked to fund the Kos–Rhodes–Karpathos link, of which the Rhodes (Thermal Power Station)–Karpathos Phase B segment forms a part.
Following submission of the Environmental Impact Assessment (EIA) for the Dodecanese electrical interconnection, including the Rhodes Thermal Power Station–Karpathos Phase B segment, IPTO expects the Ministry of Environment and Energy to issue the environmental assessment approval (Environmental Terms Approval, AEPO), which was still pending at the time of reporting.
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