Siemens opens plant for green hydrogen production

Siemens Germany, Battery, MIT, climate change, electricity, renewables, hydropower, solar

Siemens delivered the elektrolyse installation. It uses Proton Exchange Membranes (PEM)

German technology companies Siemens and Linde have taken 6 MW electrolysis plant into operation. The plant converts renewable energy into hydrogen (split water into hydrogen and oxygen). 

The pilot plant at the Energy Park Mainz costs 17 million euro’s.

Siemens has optimized this process for the rapidly varying supply of wind and solar power. The produced hydrogen serves as an energy storage for renewable electricity.

The energy park in Mainz is able to supply about 2,000 clean hydrogen fuel cell cars.


The energy systems of the future will be more complex and more flexible, as they are nowadays. PEM-elektrolyse is an important part of this new energy mixture.

Power to gas

The membrane installation is able to start quickly and slow down easily depending on the supply of renewables. The hydrogen, produced by the electrolysis industry will be used for cars driving on hydrogen but can also be admixed in small concentrations in the natural gas grid.

The system has sufficient capacity to convert the peak power of two to three wind turbines into hydrogen.

The hydrogen that is created by electrolysis can be stored and later used to generate power. The benefit of this form of electricity storage is the enormous infrastructure already offered by the natural gas network – which has huge storage capacity and a high-performing network.


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