Sorry to hear of your loss, I hope things better for you soon.
As far as I can see, grids are finished. I've written why in a few other stories, done about the time of Vietnam's experience using solar.
I hadn't heard about the Africa plan, my bad, will have a look, do you have any links?
Sorry also I have not added any pre-planned labor scenarios, to me this would be something that would come out of the system, an equilibrium point, where most work would be voluntary anyway, the system being more or less fully automated.
I don't see any of my time spent on this as towards invention. to me its just research and observation of nature, and how we need to work with it.
This is very different from the mindset I had when creating energy patents a long time ago (I really was out to invent, back then!).
This time the solution is dictated to us by the stakeholder analysis, I don't see much scope for different ways of doing things, we'll have to do what nature pushes us into doing.
What I meant by things that could prevent scaling, is most installations are designed and built to have a certain energy capacity, with all the components selected for that capacity. The need for scaleability is not somethign seen by conventional system designers or component designers, there has been no visibility previously of how to sell extra energy, other than to grids, Vietnam was a classic example of thinking an installation is over specced, because there was nothing to do with the extra energy (The governement wanted 2GW solar, they got 18 GW), so it could not all be switched on at the same time, it had to be limited to grid capacity, a lot of folk went bankrupt because they took out loans to create installations, then could not sell the energy.
If they had known about hydrogen, this would have been how to put the extra energy into product that could be stored and sold, without need of grid, and then when they sold the hydrogen and made good income from that, they would have wanted to scale up.
Hydrogen equipment is reasonably scaleable, as are panels, but the system used as standard to back it up currently is batteries, and these are usually specified and built as systems, with battery more or less "Tuned" to inverter characteristics, this is the main limiting component concerning scaleability. Its probably possible to just add more whole systems, "Doubling up", but that is a really expensive option, and needs a big margin of available real estate. It would make sense, after this limitation had been experienced by some unfortunate souls, to provide systems with more incrementable scalability, if it could be scaled up 20 or thirty percent at a time, would be much better than trying to double the size, or having to scrap a system that did 80 percent of what a new system might be specced to do. I would expect chinese manufacturers to start offering incremental scalability, if / when they see a need for it. But I wouldn't want to be dumping potentially really expensive decisions on anybody meantime.
Not good for the cause, to give folk ammo to say "It isn't viable", when actually it is, just maybe not yet.
Good luck with the simulations btw, will look forward to seeing outcome :)