Erredue S.p.a.MIL: RDUE

Agreement with groengas

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PRESS RELEASE ERREDUE SIGNS CLOSING FOR THE SUPPLY OF 3 HYDROGEN PRODUCTION PLANTS TOTALING 2.5 MW WITH DUTCH COMPANY GROENGAS ASSET BV, ACTIVE IN THE HYDROGEN MOBILITY SECTOR

The € 3.2 million contract is part of the existing order backlog currently under execution Commissioning scheduled for March 2026

Livorno, 15 July 2025 - ErreDue (EGM: RDUE), a company engaged in the design and manufacturing of highly innovative and customized on-site systems for the production, mixing, and purification of technical gases (including hydrogen via water electrolysis, nitrogen, and oxygen), announces the closing of an agreement with Groengas Asset BV ("Groengas") - a Dutch company developing hydrogen and electric solutions for the transportation sector - for the supply of three hydrogen production plants with a total capacity of 2.5 MW, for a total contract value of approximately € 3.2 million.

The plants - two rated at 1 MW and one at 0.5 MW - are part of Groengas' expansion strategy initiated in 2017 with the purchase of its first 0.5 MW production unit, later scaled up with a 1.5 MW plant. Upon project completion, Groengas will have a total installed capacity of 4.5 MW, distributed across two sites in the Netherlands: Amsterdam and Groningen. All plants will be powered exclusively by renewable energy sources.

Scheduled to enter operation by March 2026, the systems will include containerized hydrogen production units, external cooling systems, and integrated nitrogen generation solutions for service operations. Once fully operational, the plants will enable the production of over 500 tonnes of hydrogen per year at an output pressure of 30 bar.

This project holds strategic relevance at the European level, aligning with the Hydrogen Valley of Europe initiative, and will contribute to the decarbonization of the logistics and transport sectors through the supply of dedicated hydrogen refueling stations for heavy-duty vehicles.

The agreement, which strengthens a commercial partnership established in 2017, reinforces Groengas' trust in ErreDue as a reliable technological partner, and is already included in the company's order backlog under execution.

Enrico D'Angelo, Chairman of ErreDue, commented: "Renewing our collaboration with a well-established international player represents an important recognition of the quality of our products and services. Groengas' project, which began in 2017, is fully aligned with our strategic objectives and the ongoing energy transition, in which green hydrogen is set to become a key asset. Achieving the EU targets of a 55% reduction in greenhouse gas emissions by 2030 and climate neutrality by 2050 will require strong commitment to the decarbonization of hard-to-abate sectors such as mobility and transport. In this context, ErreDue is ready to contribute with effective and sustainable solutions, confirming its role as a key player". ***

This press release is available on the Company website https://www.erreduegas.it in the Media section and on https://www.1info.it.

*** PRESS RELEASE About ErreDue

ErreDue is a pioneer in zero-emission hydrogen electrolysis and a leader in the research, development, production, and commercialization of on-site hydrogen generators and systems for the production of other technical gases (nitrogen and oxygen). Its solutions serve industrial, laboratory, and medical applications, as well as emerging uses related to the energy transition, such as power-to-gas, sustainable mobility (small-scale hydrogen refueling stations), and industrial decarbonization. Headquartered in Livorno, ErreDue reported Production Value of €19.1 million in 2024. Since 6 December 2022, ErreDue has been listed on Euronext Growth Milan, organized and managed by Borsa Italiana S.p.A.

For more information: https://www.erreduegas.it

Per ulteriori informazioni: Euronext Growth Advisor Value Track SIM S.p.A.

giovanni.tommasi@value-track.com

Investor e Media Relation ErreDue Eliana Bollino elianabollino@erreduegas.it CDR Communication Investor

Silvia Di Rosa: silvia.dirosa@cdr-communication.it

Marika Martinciglio: marika.martinciglio@cdr-communication.it

CDR Communication Media Relation

Angelo Brunello: angelo.brunello@cdr-communication.it Stefania Trevisol: stefania.trevisol@cdr-communication.it

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