This post is along the lines of "give a zealot enough rope..."
I keep hammering on my token, Progressive friend about the problems with intermittency of solar and wind-power.
He assures me that those problems were solved in the 1960s(!). He claims that debugged, validated hydrogen fuel cells are ready to rock-and-roll, that excess electricity at the solar farm or wind farm can be turned into hydrogen and piped via existing pipelines to people's homes.
According to my friend, a Hydrogen Fuel Cell the size of a toaster oven can supply all the electricity needed by a house. A HFC enough electricity for a school and so-on and so-forth.
When pressed, he says he is too busy to dig up the research and the academic papers, but he has personally talked to generals in the military and titans-of-industry who agree that it is so.
If you were looking for a tree you would look in a forest. If you were looking for a fish you would look in a stream or the ocean.
If you were looking for a pilot (or production) HFC economy you would look in countries with developed technology, abundant sunshine, hostile neighbors and no petroleum reserves and no hydro or geothermal resources.
Candidates that come to mind are Israel, Pakistan (hey, they have the nuke), India, South Africa (they had the technical chops at one time), Australia, the leeward side of the big Island of Hawaii, California.
If HFC is plug-and-play technology, one would expect to see some running at least at the university level.