Strategic Agreement between METLEN and Karatzis Group for the Largest Standalone Energy Storage Unit in Greece
Athens, Greece – October 10, 2025 – METLEN Energy & Metals (RIC: MYTr.AT, Bloomberg: MYTIL.GA, ADR: MYTHY US) and the Karatzis Group of Companies are entering into a new strategic partnership through their participation in a joint investment scheme with shares of 49% and 51%, respectively, for the development, construction, operation, and energy management of a 330MW / 790MWh electricity storage unit in Thessaly.
This is the largest standalone energy storage project initiated to date in Greece. The investment complements and expands the collaboration between the two Groups for the sale and absorption of green energy, which since August 2024 has involved the implementation of a portfolio of photovoltaic stations with a total capacity of 262 MW in the same area.
The project’s implementation is expected to be completed within the second quarter of 2026. Through this investment, METLEN will undertake the construction, operation, and maintenance of the facility via M Renewables. It is worth noting that M Renewables, part of METLEN’s Energy Sector, has extensive experience in executing complex Battery Energy Storage System (BESS) projects, with presence and operations across five continents. In 2024 alone, METLEN completed storage projects totaling approximately 0.7 GWh, while also being in the final stage of agreements for third-party projects totaling 2.2 GWh.
Through strategic partnerships such as this one with the Karatzis Group, METLEN reaffirms its leading role in strengthening energy security and driving the green transition, creating the Utility of the next day.
For more information, please contact:
Ms. Antigoni Fakou: METLEN Press Office Tel.: +30 210-6877346 | Fax: +30 210-6877400 | Email: [email protected]
METLEN:
METLEN Energy & Metals is an international industrial and energy company, a leader in the metallurgy and energy sectors, focused on sustainable development and the circular economy. The company is listed on the Athens Stock Exchange, with consolidated turnover and EBITDA amounting to €5.68 billion and €1.08 billion, respectively. METLEN is a benchmark for competitive “green” metallurgy at both European and global levels and operates the only fully integrated bauxite, alumina, and primary aluminum production unit in the European Union (EU), with its own port facilities.
In the energy sector, METLEN offers comprehensive solutions by implementing thermal and renewable energy projects, electricity distribution and trading, as well as investing in network infrastructure, battery storage, and other green technologies. The company operates in more than 40 countries across five continents, applying a fully collaborative model between its metallurgy, energy, and end-to-end development divisions of landmark energy projects.
www.metlengroup.com | Facebook | Twitter | YouTube | LinkedIn
For more information about the Karatzis Group, please contact:
Ms. Antigoni Andreaki & Ms. Nitsa Daskalaki: Karatzis Group Press Office Tel.: +30 2810-382900 | Fax: +30 2810-381400 | Email: [email protected] & [email protected]
KARATZIS GROUP OF COMPANIES:
The Karatzis Group of Companies is a pioneer across a wide range of business activities, including the production of packaging nets, shading nets, and multilayer silage films, as well as renewable energy, private aviation, and hospitality. Over fifty years of operation, the Group has expanded globally through subsidiaries and strategic partnerships, maintaining a commercial presence in 72 countries. With a workforce of over 1,500 employees, the Group provides high-value-added products and services worldwide. Its expansion into diverse sectors through subsidiaries such as Panellenic Airlines—which offers private flights and luxury travel services with state-of-the-art aircraft—and subsidiaries in the renewable energy sector, which hold a development portfolio of 1GW in capacity and 430MW in storage units, reflects the Group’s continuous pursuit of growth and excellence. Additionally, its three 5-star resorts—Nana Golden Beach, Nana Princess Resort & Spa, and the recently acquired Nana Knossos, currently undergoing a full renovation—together with the Nana Tennis & Sports Club, redefine hospitality in Crete. Dedicated to Sustainability and Sustainable Development, the Karatzis Group continually invests in projects and technologies that ensure optimal outcomes for people and the environment. It is considered a “green” group, with all its energy needs met through power generated by its own Renewable Energy Sources (RES) facilities.