As in this recent story: "World's largest green-hydrogen plant begins operation in Austria" https://www.rechargenews.com/transition/worlds-largest-green-hydro

As in this recent story: "World's largest green-hydrogen plant begins operation in Austria" https://www.rechargenews.com/transition/worlds-largest-green-hydrogen-plant-begins-operation-in-austria/2-1-708381 https://www.rechargenews.com/transition/worlds-largest-green... It's using PEM technology from Siemens. It reports that an even larger PEM project should finish construction next year. It mentions one other project, even larger but further out, using alkaline electrolyzers. They are all part of decarbonization research projects, but operating at megawatts to tens of megawatts scales.