First, a pioneering project only means something if there is a big market to pioneer to.
Second, for the pioneering project to get any sort of traction, it has to be a lot better than what it is replacing. You've seen how hard it was for EVs to get going (and they are still are a small part of the market) EVEN THOUGH they had massive advantages over ICE cars. Hydrogen power backup does not have massive advantages, in fact, the exact opposite. Power backups MUST work. What do you do when your very hard to store Hydrogen leaks out and you need a refill during a massive power outage? The reason diesel is used for power backup is that the liquid is ubiquitous - you can get it anywhere in any circumstance.
It's kinda like investing in fusion research. If you actually research the technical problems that must be overcome for fusion, you realize that it is a fool's errand. You are literally wasting money. Not everything that someone dreams up is practical.
But look, far be it by me to argue against investing in hydrogen research. If you want to spend your money there, go for it. I'll put my money into other research areas that I think have a much higher chance of being useful (
as I recently posted here).