Dear friends,
you might want to look into this also:
http://redgreenandblue.org/2019/05/05/sunday-train-worlds-first-solar-powered-railroad/
https://futurism.com/the-largest-rail-network-in-asia-just-debuted-a-solar-paneled-train
https://www.youtube.com/watch?v=1SafVI7vKs4&feature=share
Best wishes, Helmut ( Germany )