It's already there - https://www.alstom.com/press-releases-news/2023/8/alstom-and-verkehrsverbund-mittelsachsen-present-new-battery-powered-electric-train-germa

It's already there - https://www.alstom.com/press-releases-news/2023/8/alstom-and-verkehrsverbund-mittelsachsen-present-new-battery-powered-electric-train-germany https://www.alstom.com/press-releases-news/2023/8/alstom-and... Hydrogen is also already used for trains - https://www.alstom.com/solutions/rolling-stock/alstom-coradia-ilint-worlds-1st-hydrogen-powered-passenger-train https://www.alstom.com/solutions/rolling-stock/alstom-coradi...