[Hypx_]

There is no hard limit except 100% efficiency (sorta*). As fuel cells are a type of battery they can eventually match li-ion batteries on efficiency. Combined with their ability to capture curtail power on a very large scale and the economics of hydrogen could easily surpass that of the EV.

* There is a soft limit at 85%, but that is mainly due to the need to turn liquid water into steam over the entire process. This can be ignored if electrolysis is done on steam instead of liquid water. Also, 85% is close enough to li-ion batteries that very few people will care about it.

[dang]

It looks like you've created this account to argue only about one thing on HN. Agenda-driven accounts and single-purpose accounts are not allowed here, regardless of the agenda/purpose, because it's not in keeping with the values of this site—i.e. intellectual curiosity doesn't work that way. So would you please stop?

https://news.ycombinator.com/newsguidelines.html