1) Fuel cells are batteries too. This is no different chemically speaking. 2) It will be cheaper than what it would take to overhaul the grid. The problem is t

1) Fuel cells are batteries too. This is no different chemically speaking. 2) It will be cheaper than what it would take to overhaul the grid. The problem is that we must get rid of all fossil fuels while also radically increasing capacity. A near impossibility by any reasonable estimation. 3) Hydrogen are safer than batteries. There is no substantial risk and it is trivial to manage. Meanwhile many people have died in battery fires.