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It would be interesting to see how much measurable energy from direct sunlight is required to produce a usable amount of hydrogen, compared to how much solar or wind derived electrical energy is needed to generate a similar amount of hydrogen through electrolysis?

Electrolysis generated hydrogen currently seems to be one potential solution to renewable-power generated electrical surpluses.

Power plants which cannot quickly throttle down their power output, also could benefit if their excess electrical output was directed to hydrogen production, rather than dumping electricity on the market well below production cost.