August 12, 2025 [H2 View]- Municipal utility company Mainzer Stadtwerke and Linde have agreed to upgrade the Energiepark Mainz hydrogen production plant under a new 15-year extension agreement.

The German facility, which was launched in 2015, has been using wind power to produce green hydrogen. Linde claimed it was the first large-scale project to use excess renewable energy and convert it into hydrogen.

Under the extension agreement, the partners plan to develop Mainz Energy Park 2.0 on the same site, replacing the decade-old Siemens PEM electrolysers with modern units delivering 5MW of capacity, H2 View understands.

The existing hydrogen refuelling station will also be upgraded. The whole project will reportedly be supported with €2.5m ($2.9m) from the German Federal Ministry for Digital and Transport (BMV).

The two companies aim to start work immediately, ahead of the commissioning anticipated for 2027.

“Renewable hydrogen from Mainz has helped Linde customers decarbonise their operations and supported the natural gas grid to produce heat and electricity,” the oil and gas major stated on LinkedIn.

“This extension will continue to drive energy resilience forward,” Linde added.

The site also includes compression units, hydrogen storage, trailer filling infrastructure, and injection into the natural gas grid for blending, although it is unclear whether these technologies and processes will be upgraded too.

Despite plans to upgrade its green hydrogen facility in Mainz, Linde has signalled a stronger global focus on blue hydrogen this year, favouring green projects only where low-cost renewable energy is accessible.

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