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that the electricity from a renewable source is more efficiently used directly charging EVs, or powering heat pumps, than creating H2, storing it, then converting it back to electricity, then charging EVs/powering heat pumps. H2 the plants and infrastructure are more complicated, thus more expensive, and have a higher maintenance cost.

Also, you did bring up the issue of weight, with H2 being much lighter as a storage medium than batteries, but weight is irrelevant to a power plant. Weight is an issue in transportation, but the current HFCEV still have chemical batteries, and don’t weigh that much less than BEVs. The loss in efficiency converting H2 back into electricity still has pure BEVs more efficient per unit of weight than a fuel cell vehicle.

If I have an HFCEV, I am back to going to a special station to get re-fueled, and must pay for that fuel each time. Right now, I re-fuel my EV every night when I come home, at a fraction of the cost of the traditional way (FF), or H2.

And to power my house, why would I use my solar array to make H2, and then power my house at a fraction of the efficiency of simply using the electricity and skipping the whole electricity-to H2-to electricity step? My house averages 50-60kWh of electricity production a day, why would I use that to make a single kg of H2, that would provide me with 34kWh of electricity?