There may be the issue of demand. PV cells apparently require a lot of material compared to a lot of other potential applications of GaAs (RF? Optoelectronics?). If you really started mass-producing them from GaAs, you'd start straining the global supply (200 tonnes per year or so?) long before you'd reach anything close to current global production of silicon-based PV cells.

So, does that mean that blasphemy has also been retracted as an Indian legal concept?

There will always be demand for hydrocarbons and fertilizers, for example. And as a high-current, low-voltage application, hydrogen generation is much better suited for at least somewhat centralized production. You probably don't want to haul very thick and expensive cables over large distances. So, yes, it's quite plausible that in the future, most people will be at least partially self-sufficient, but there will always be need for industrial levels of power. Especially with ever-cheaper PV modules and increasing energy needs for advanced resource extraction and manufacturing .

That's obvious from the fact that you forgot to mention the scale used and the test. ;)

That has been shown to be increasingly difficult.

What does that have to do with a private taxi service collecting data on your movements? That's a matter for the municipal administration to solve.

The thing is, secrets regarding physics and engineering aren't secrets. Secrets regarding politics, treaties, negotiations, trade, yes, those exist. But those don't have anything to do with laws of nature working for everyone in the same way, though.

He already did that...

Marginally. You seem to be suffering from imbalance of humor.

Heh, it all boils down to Michael Bay, then. Good for them! And for you, I guess...

Surely you can afford the commerical licenses, then. ;-)

20 years, isn't that something like ~7000 charging cycles? I haven't heard of such lead batteries. And why exactly is NiFe expensive? It doesn't seem to be using anything exotic. Isn't it simply because the contemporary production is low?

One could, if one had very bad reading comprehension.

That's what I meant by what I wrote.

Advanced capacitors (perhaps even pseudocapacitors) could be a much better option. Yes, they're bulky, which is why they aren't used in vehicles, but houses don't care about that, and their cycle life is such that $/lifetime-kWh could be an order of magnitude better than in batteries. Plus, to my knowledge, no rare materials are required, it's generally aluminum foil, some carbon material, and organic liquids.

Are we still talking about households, or about three-shift factories? Households do not have the same power consumption at night. Granted, if you live in an ancient structure with lousy thermal management and you're compensating for it with a AC without heat storage, then yeah, perhaps, but there's no reason in principle why you should be forced to be able to replicate your daylight power use with batteries at night.