Electrolysis is about 20% effective. That's why you don't really see hydrogen being seriously considered for grid backup. Mass produced hydrogen comes from fo

Electrolysis is about 20% effective. That's why you don't really see hydrogen being seriously considered for grid backup. Mass produced hydrogen comes from fossil fuels. That said, I agree hydrogen might have a role in shipping and flight. Just not grid storage. LFPs and sodium chemistry are both cheap with a long life. That's what will more commonly be deployed.