> You can also store "waste" renewable energy in EV batteries Yes you can, but the time when solar energy is the most abundant is in the the middle of the day,

> You can also store "waste" renewable energy in EV batteries Yes you can, but the time when solar energy is the most abundant is in the the middle of the day, typically when people are away from home and not charging their cars. Hydrogen can be stored for years in huge tanks so it is really "on demand". Unlike batteries, tank benefit from the square cube law and therefore makes large scale storage cheaper. And BTW, personally, I am not convinced by hydrogen cars, but it doesn't look completely stupid either.