[leibnizwasright]

Even though this uses Hydrogen, which means small quantity of water, water still a finite resource, it becomes costly every year, specially the one that's drinkable. This seems like a double sword, solving one side, while it makes other worse.

[programbreeding]

Does this require potable water though?

[leibnizwasright]

It does not say if requires potable water or how much of it would be necessary for big batteries. But I imagine potable water would serve for optimal reactions.