Renewables

Green light in Greece for expansion of future photovoltaic, green hydrogen complex

Greece expansion future photovoltaic green hydrogen complex

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Published

November 4, 2025

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Published:

November 4, 2025

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Greece approved the request of a firm developing a project for a giant solar park with a green hydrogen plant to double the electrolyzer capacity. The site is in the vicinity of the village of Mantasia in the Phthiotis regional unit.

The Ministry of Environment and Energy in Athens signed off on a proposed change in the project for a complex that would consist of a photovoltaic plant of a whopping 251.9 MW in peak capacity and a system for the production of green hydrogen, Newmoney reported. Mantasia Energeiaki, the project firm, is controlled by German companies Altus and Yamko Energy and France-based Omnes Capital, according to the article.

They can build a 100 MW green hydrogen unit, instead of the initially planned 50 MW. Altus is a subsidiary of Kraftwerke Mainz-Wiesbaden AG (KMW).

The project developers are planning to produce hydrogen in PEM electrolyzers

The site, Karahasan, is near Mantasia, a village in the municipality of Domokos in the Phthiotis (Fthiotida) regional unit. Most of the area is in the territory of the community of Fyliadonos. The proton exchange membrane (PEM) electrolysis facility would comprise ten units of 10 MW.

Total area envisaged for the project in Central Greece spans ​​427 hectares, of which 1.1 hectares for green hydrogen production. It would be stored in several units of 40 tons overall.

The project includes a 400/33 kV substation, with a capacity of 600 MVA, equivalent to 600 MW, as two similar projects would be connected through it. As for the PV plant, it would have 530 W monocrystalline silicon modules and 48 Sunny Central 4600 UP inverters.

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