Don't know why you 2 are discussing but hydrogen is just an intermediate to store energy. To produce it you still need some energy resource e.g. best would be the sun.
We have solar panels on our roof and on a sunny day they produce around 10kW (for your ref Korn, on a cloudy day around 0.7kW to 1.2kW). Hydrogen fuel cell in a car produces around 100kW.
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