The municipal utility of Mainz together with Linde, Siemens, and a local university established the largest facility in the world that generates hydrogen from renewable electricity. With 17 million euros in research funding, the new facility has just gone into operation (report in German). It takes excess electricity, partly from nearby wind turbines, to produce hydrogen by means of electrolysis. The system can convert up to six megawatts of electricity at a time. Apparently, there is no specific storage limit; trucks supply nearby hydrogen stations with green hydrogen from a local hydrogen storage facility enough to power “2,000 fuel cell cars.”

photo: Mainz Microtron,

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