Wind power capacity connected to Greece’s electricity grid reached 5,695 megawatts by the end of 2025, up 6.4% from a year earlier, according to annual statistics published by the Hellenic Wind Energy Association (ELETAEN).
The industry added 76 new turbines with a combined capacity of 340 MW during the year, representing investments of more than 420 million euros ($455 million). ELETAEN said installation activity rebounded to the decade average after a slowdown in 2024, highlighting what it described as the sector’s resilience despite administrative obstacles and bureaucracy.
At the end of 2025, more than 1.1 gigawatts of new wind capacity was under construction or contracted, with the majority expected to come online within the next 18 months. A further 200 MW selected in competitive tenders had submitted financial guarantees but were not included in those categories.
As a result, national wind capacity is expected to exceed 6.5 GW within the next year and a half, ELETAEN said.
Central Greece remained the country’s leading wind region with 2,466 MW of installed capacity, followed by the Peloponnese with 790 MW and Eastern Macedonia–Thrace with 535 MW.
Terna Energy was the largest investor with 1,034 MW installed, followed by More with 774 MW, Iberdrola Rokas with 409 MW, Principia with 368 MW and PPC Renewables with 319 MW.
By manufacturer, Vestas turbines accounted for 44% of total installed capacity, ahead of Enercon with 25%, Siemens Gamesa with 15.8%, Nordex with 9.2% and GE Renewable Energy with 4.3%. In 2025 alone, new capacity was supplied mainly by Nordex with 133 MW and Vestas with 109.1 MW, followed by GE Renewable Energy, Enercon, Goldwind and Vensys.
ELETAEN said that of the 1,592 MW of wind projects awarded through tenders between 2018 and 2022, only 852.4 MW were operational by the end of 2025 due to bureaucratic delays. It said these delays had prevented more than 740 MW of low-cost wind projects from delivering cheaper electricity to consumers and the wider economy.
The association also highlighted rising system penetration by renewables. Wind power reached a record 97.2% of hourly electricity demand in the interconnected system on April 28, 2025. Wind generation exceeded 50% of demand for 616 hours during the year, while combined wind and solar photovoltaic output surpassed 50% for 3,335 hours. Total wind and solar generation met or exceeded 100% of demand for 212 hours without causing system problems, ELETAEN said.
The association said it would update its national wind energy geoinformation map in the coming days.
