I agree not feasible as a grid. Why would we need grids if we were all equipped on a domestic and community basis? I guess you are probably not aware that the majority of installed solar is not with utilities energy companies at all, its in domestic and community installations.
I guess you are probably also not aware that utilities energy supply has already lost between 30% and 50% of their markets to domestic and community solar, and this continues to grow, like the leaves on a tree.
So grids are finished already, energy companies are going bust all over the place because their market has shrunk, whilst their shareholder obligations have not.
The story linked below shows how to analyse this numerically. I recommend you try it out on your own country, whichever one that is.
As for hydrogen generation, the fact still stands that every kg produced is 33KWhrs removed from the heat of the sun, no matter how we cut it, this is a hard physical fact, regardless of efficiency.
A 2.4 KW electrolyser the size of a small server, "Enapter", produces 1kg every 24 hrs. A large domestic solar installation, or installation involving two or three houses, can easily supply 2.4 KW 24/7, in addition to its usual domestic load, just by over-specifying the installation.
Given you had such an installation, with also the capability of using some of the hydrogen yourself as additional backup, would you sell everything you produced? We wouldn't, none of us, because we can never predict the future, we can never know what we need in advance, and it would take years to establish any trends, given big differences between summer and winter.
So there would be a stock of hydrogen which would build up, across all domestic and community installations.
The energy in that stock, would be effectively heat taken from the sun, in exactly the same way as the heat was taken from the sun by the creation of original fuel stocks, by nature.
We would be putting back the natural heatsink we removed.
Do you think I have any part of that wrong?
Add to that, hydrogen converts to food (See "Solein"), and aerospace is crying out for a clean fuel that can replace fossil fuels, (batteries will never do it) and you should see nature is pushing us in a certain direction.
I suggest we go with the flow.
