REG - Metlen Energy&Metals - Agreement between METLEN and Karatzis Group

Metlen Energy & MetalsAnnouncement

09/10/2025 12:30

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RNS Number : 7496C  Metlen Energy & Metals PLC  09 October 2025

PRESS RELEASE

 

Strategic Agreement between METLEN and Karatzis Group for the Largest
Standalone Energy Storage Unit in Greece

 

Athens, Greece / London, United Kingdom - October 9, 2025 - METLEN
(http://www.metlengroup.com/)  (RIC: MTLN.L, Bloomberg: MTLN.LN, MTLN.GA,
ADR: MYTHY US) and Karatzis Group of Companies (https://www.karatzis.gr/) are
entering into a new strategic partnership, through a joint venture with
ownership stakes of 49% and 51% respectively, for the development,
construction, operation, and energy management of a Battery Energy Storage
System (BESS) with a capacity of 330MW / 790MWh in Thessaly, Greece.

This will be the largest standalone storage unit planned to date in Greece and
one of the biggest in Europe. The partnership builds on the existing
cooperation between the two Companies in the sale and absorption of green
energy, which since August 2024 has involved the implementation of a portfolio
of solar stations with a total capacity of 262MW in the same region.

The total investment for this project, which is expected to be completed
within the second quarter of 2026, amounts to around €170Mio. No further
grants  or tax reliefs are expected for this project.

By investing in this pioneering project for the Greek energy market, METLEN
undertakes the full construction, operation, and maintenance of the unit
through M Renewables. The M Renewables segment of METLEN's Energy Sector has
proven experience in implementing complex energy storage (BESS) projects, with
presence and projects on five continents. In 2024 alone, METLEN completed
storage projects with a total capacity of ~0.7GWh and is in the final stages
of agreements for third-party projects totaling 2.2GWh.

Through strategic partnerships such as this one with Karatzis Group with which
it has had excellent cooperation in the last few years, METLEN reaffirms its
leading role in strengthening energy security and advancing the green
transition, building the next-generation Utility.

 

Notes to editors:

Official photo material of METLEN and its activities can be found here
(https://www.metlengroup.com/photo-gallery?category=press-kit) .

 

For further information about METLEN please contact:

Ms. Antigoni Fakou: METLEN Press Office, Tel. +30210-6877346 | Fax
+30210-6877400 | E-mail: Antigoni.fakou@metlengroup.com
(mailto:Antigoni.fakou@metlengroup.com)

 

METLEN:

METLEN Energy & Metals PLC (METLEN or the Company) is the parent company
of a multinational industrial and energy group and a leader in metallurgy and
energy industries, focusing on sustainability and circular economy. The
Company is primary listed on the London Stock Exchange with a secondary
listing on the Athens Exchange, having a consolidated turnover and EBITDA of
€5.68 billion and €1.08 billion, respectively, (2024). METLEN's group is a
reference point for competitive green metallurgy at the European and global
level, whilst operating only vertically integrated bauxite, alumina and
primary aluminum production unit in the European Union (E.U.) with privately
owned port facilities. In the energy sector, METLEN's group offers
comprehensive solutions, covering thermal and renewable energy projects,
electricity distribution and trading, alongside investments in grid
infrastructure, battery storage, and other green technologies. The Company's
group is active in the markets of all five continents, in more than 40
countries, adopting a full-scale synergetic model between the Metallurgy and
Energy Sectors, while undertaking end-to-end development of major energy
infrastructure projects.

www.metlengroup.com (http://www.metlengroup.com) | Facebook
(https://www.facebook.com/MytilineosSA/) | Twitter
(https://twitter.com/MytilineosSA) | YouTube
(https://www.youtube.com/user/MytilineosGroup) | LinkedIn
(https://www.linkedin.com/company/6646293/)

 

For more information about Karatzis Group please contact:

Ms. Antigoni Andreaki & Ms. Nitsa Daskalaki: Karatzis Group Press Office

Tel. +30 2810-382900 | Fax +30 2810-381400 | Email: secretariat@karatzis.gr
(mailto:secretariat@karatzis.gr)

 

KARATZIS GROUP OF COMPANIES

Karatzis Group of Companies is a pioneer in a wide range of business
activities, spanning from the production of nets and multi-layer silage films
to renewable energy, private aviation, and hospitality. Founded in 1973, the
company has achieved global presence over 50 years of expansion through
subsidiaries and strategic partnerships, with commercial presence in 72
countries.

With a workforce exceeding 1,000 employees, the Group delivers high
value-added products and services worldwide. Its expansion into diverse
sectors through subsidiaries such as Panellenic Airlines, which provides
private flights and luxury travel services with state-of-the-art aircraft, as
well as subsidiaries in the RES sector with a development pipeline of 1GW and
storage units of 430MW, underlines the Group's constant pursuit of growth and
excellence.

In hospitality, the creation of the 5-star Nana Golden Beach Resort in the
early 1980s, followed by the Nana Princess Resort and SPA in 2018, along with
the Nana Tennis & Sports Club, has redefined hospitality in Crete.

Committed to Sustainability and Sustainable Development, Karatzis Group
continuously 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 fully covered by power generated from its own Renewable Energy
Sources (RES) units.

www.karatzisgroup.gr (http://www.karatzisgroup.gr/)  | LinkedIn
(https://www.linkedin.com/company/karatzis-group-of-companies/)

 

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