Hellenic Hydrogen, a joint venture of Greek power utility PPC SA (<a href="https://www.athexgroup.gr/en/market-data/instruments/stocks/PPC" target="_blank">ATH:PPC</a>) and domestic petroleum refiner Motor Oil Hellas (<a href="https://www.athexgroup.gr/en/market-data/instruments/stocks/MOH" target="_blank">ATH:MOH</a>) has received regulatory approval to install a 100-MW electrolyser at the site of a former coal-fired power station.