February 2026 – Organization of a One-Day Conference on the Project “Ai Stratis - Green Island” within the framework of Verde.Tec Forum 2026.
On Friday, February 27, from 16:15 to 18:00, a one-day conference on the project “Agios Efstratios – Green Island” will be hosted in WORKSHOP 1 Hall at the MEC Paiania Exhibition Center. The conference will feature presentations by the Centre for Renewable Energy Sources and Saving (CRES) and the Hellenic Electricity Distribution Network Operator (HEDNO), and with the participation of GEK TERNA. The event is part of Verde.Tec Forum 2026, held within the framework of the 8th International Verde.Tec Exhibition for Environmental Technologies. The Exhibition, the parallel Verde.Tec Forum, and the Greek Green Awards will take place from February 27 to March 1, 2026, at the MEC Exhibition Center in Paiania.
November 2025 - Commissioning of the Hybrid Station
Following the successful completion of the testing period, the system was commissioned for operation with the approval of HEDNO (Hellenic Electricity Distribution Network Operator). The electricity generation system from Renewable Energy Sources (RES) and the integrated district heating system, which utilizes the excess energy from the hybrid RES plant, are now capable of supplying electricity and providing heating to the settlement of Agios Efstratios using environmentally friendly energy sources.
July 2025 - Start of Trial Operation of the Hybrid Power Plant
In early July, the trial operation of the Hybrid Power Plant in Agios Efstratios began, within the framework of the Ai Stratis - Green Island project, which makes the island the first in Greece to fully cover its energy needs from Renewable Energy Sources (RES), without the need to use conventional units.
January 2023 - Commencement of Construction of the Hybrid Electricity and Heat Power Plant
In mid-January 2023, construction works began by the contractor, TERNA ENERGY, including the mobilization of personnel, organization of the project machinery, and setup of the construction site facilities. This was followed bythe commencement of works on the district heating network, infrastructure works for the foundations of the wind turbine and photovoltaic panels, as well as other related construction activities.
March 2021 - Signing of Contract between CRES and TERNA ENERGY for the Assignment of the Project “Hybrid System for the Production of Electrical and Thermal Energy from RES on theisland of Agios Efstratios“
Following the announcement of an Open Tender by CRES, the contract for the project “Hybrid System for the Production of Electrical and Thermal Energy from RES on the island of Agios Efstratios” was signed with the company TERNA ENERGY.
October 2020 - TERNA ENERGY Awarded the CRES Tender for the Transformation of Agios Efstratios into a “Green Island”
TERNA ENERGY was awarded the CRES tender titled “Hybrid System for the Production of Electrical and Thermal Energy from Renewable Energy Sources (RES) on the Island of Agios Efstratios,” aiming at the conversion of Agios Efstratios into a “Green Island.”
The project assigned to TERNA ENERGY includes the design, procurement, installation, and commissioning of:
- a Hybrid Power Station (HPS) based on Renewable Energy Sources (RES), that includes a wind turbine, a photovoltaic plant, battery storage units, and an Energy Management and Control System,
- a comprehensive District Heating System (DHS) for the settlement of Agios Efstratios.
The District Heating System (DHS) will comprise central heat production and storage units (hot water storage tanks), as well as a heat distribution network supplying thermal energy to end users. The thermal energy produced will cover the heating and domestic hot water needs of the buildings in the settlement of Agios Efstratios.
The objective of the project is to achieve a RES penetration level of more than 85% in the island’s electrical system, while maximizing the share of heating and domestic hot water demand covered by RES.
TERNA ENERGY, as the project contractor, will be responsible for the operation and maintenance of the system for a period of twelve (12) years.
June 2020 - Tender Announcement for the Award of the project “Hybrid System for the Production of Electrical and Thermal Energy from Renewable Energy Sources (RES) on the Island of Agios Efstratios”
On 4 June, CRES launched an Open Tender for the award of a supply contract for the project “Hybrid System for the Production of Electrical and Thermal Energy from Renewable Energy Sources (RES) on the Island of Agios Efstratios,” within the framework of the Action “Support of Policies and Coverage of Future Needs – GREEN ISLAND” (MIS 5003098).