A large-scale hybrid renewable project is taking shape in central Greece following a new partnership between Metlen Energy & Metals and the Tsakos Group. The two companies have agreed to jointly develop a solar power plant combined with battery storage, positioning the project among the most ambitious hybrid renewable initiatives currently planned in the country.
The cooperation will be carried out through a special-purpose project company, in which Metlen will hold a 40% stake, while the remaining 60% will be owned by the Tsakos Group. The partners aim to deliver a facility with almost 252 MW of solar capacity, supported by battery storage of 375 MWh, enabling enhanced flexibility and grid support.
Metlen will lead the technical implementation of the project, covering engineering, construction, and the management of electricity sales and market participation through its proprietary energy management platform. The integrated approach is designed to closely link large-scale solar generation with storage, improving efficiency and operational flexibility. Project implementation is expected to begin in 2026, with commercial operation targeted for early 2028.
Although the companies have not disclosed the total investment value, the sheer scale of the installation places it among the largest hybrid renewable projects currently in development in Greece.
For the Tsakos Group, the agreement marks another step in its diversification beyond shipping. While internationally recognized for its maritime operations, the group has been steadily expanding its presence in renewable energy, already participating in solar projects and advancing a broader pipeline of green investments across Greece.
The partnership highlights a broader trend in the Greek energy sector, where industrial and shipping groups are increasingly teaming up with established energy companies to accelerate the deployment of storage-backed renewable projects that enhance network stability and support the country’s clean energy transition.