Greek developer Metlen Energy and Metals and Greek maritime company Tsakos Group have started construction at a 251.9MW solar-plus-storage project in Greece.
Dubbed by the developer as one of the largest hybrid projects in the country, the solar-plus-storage plant will be located in the municipality of Domokos, Central Greece.
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The solar PV plant will be co-located with a 375MWh battery energy storage system (BESS).
The companies held a groundbreaking ceremony in Domokos, and it comes three months after Metlen acquired a 40% stake in a special purpose vehicle (SPV), owned by Tsakos Group, which is responsible for developing the solar-plus-storage project.
Tsakos Group retains the remaining 60% of the SPV, with Metlen undertaking construction of the project, as well as the energy and commercial management of the facility. Both companies signed a strategic partnership at the beginning of the year for the development of the project.
Commercial operations for the solar-plus-storage project is forecast to begin in early 2028.
Construction of the 252MW solar-plus-storage project will help accelerate the deployment of solar PV in Greece, which has seen its growth slow down in 2025 with a slight 4% decrease year-on-year and 2.5GW of new solar PV installed, according to data from trade body SolarPower Europe.
Utility-scale solar projects, such as this one, have been the main drivers for new solar installations in 2025, accounting for 72% of the 2.5GW. Cumulatively, utility-scale solar represented 45% of the 12.2GW of installed solar PV at the end of 2025.
