There are a few recent developments in hydrogen technology missing from your analysis, and some inconsistencies in the energy supply of hydrogen creation that you've based the analyses on, which if you update, the conclusion will look very different, I think.
The main recent development, which takes out batteries as any contender, is the commercial availability of reversible fuel cells, and complete solar installation backup solutions based on those. Reversible fuel cells act like batteries until charged, after which they begin to generate green hydrogen. They also require no rare Earth elements to manufacture.
So a reversible fuel cell backed up solar farm installation whilst put to work fully loaded, will generate no hydrogen, but at off-peak times, will generate valuable hydrogen fuel with the unused solar capacity, which can be sold to increase revenues from the solar installation, regardless of loading intermittency.
The inconsistency in energy supply is where you've identified green hydrogen as expensive, you have quoted commercial electricity prices, when the electricity could be direct from solar, which costs nothing after installation, so the price of green hydrogen manufacture by the only clean source of power is zero, with also zero emissions in manufacture.
The reason this is much further ahead than you have maybe seen from popular technical press, is that the combination of solar power with hydrogen gives capitalists, and capitalism a real headache, so they don't like to talk about it, far less support it in any way.
That has to be because when we look at the mathematical system analysis of incorporating physical fuel-as-solar energy into our economic system, we see an ever increasing source of capital dilution, that is the valuable Joules added from sunlight, which are not part of the capital already on Earth, are additional to that capital.
So the more solar power we use, the harder it gets to keep ignoring this physical fact.
That, is far more provable reason for the inflation we are seeing, but the outcome isn't bad for anyone not significantly invested in capital - free money.
Because the only way to honor the Austrian Economics ideal of all monies issed being balanced with existing product, is to continuously issue money, and since there is no labor associated with the extraction of the energy from sunlight (After installation), it follows that the money issued should be to those not contributing any labor, for whatever reason.
See, solar power has UBI built in... A heck of a lot of UBI.
The inveitable physical presence of solar donated Joules in the markets, in the form of barrels of green hydrogen fuel, which replace fossil fuels in function, with none of the pollution, will make it very difficult to ignore this physical reality, which will lead to the complete devaluation of all capital when we are finally completely solar powered.
Already we see the former king of capital, gold, devaluing compared with Bitcoin, which is somthing more than capital - as outlined in my Bitcoin Kardashev Hinge story.
I hope you find that encouraging :)
