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Amazon plans to make its own hydrogen to power vehicles
(www.theverge.com)
This is a most excellent place for technology news and articles.
I'm not saying it shouldn't, I'm saying for a hydrogen plant for warehouses, renewables are absolutely fine. We're not solving all the electrical needs of the warehouse here, only the vehicles.
So renewables can refill the tanks, and hydrogen can power the vehicles. As long as there's enough wind and sun on average to keep the tanks full enough, it'll work.