ChemistrySplitting water in an alkaline bath
Current flows between electrodes in a potash-water solution: hydrogen bubbles off one side and oxygen off the other, kept apart by a thin separator.
CellsZero-gap cells
Electrodes press right against the separator, cutting the electrical resistance of the liquid between them, which saves power per kilo of hydrogen.
FlexibilityFollows wind and solar
A module can run from 10% to 100% of its 20 MW, so it can track variable renewable power instead of needing a flat supply.
ScaleModules in parallel
Plants are built by lining up identical modules: 15 for Moeve's 300 MW, 37 for Stegra's roughly 740 MW.