[margalabargala]

Okay, sure, but that's no different than the same identical "warning signs" that people have been flipping out about since the 1960s.

Maybe some individual country will have some collapse, but all of human civilization will not.

I.maintain that if you're worried about any of that, you are still better off stockpiling panels now, than developing ways to make your own much worse ones in your backyard.

DIY photovoltaics can be a fun hobby but for someone worried about an actual collapse they can acquire a lifetime supply of solar panels and batteries for less money and time than setting up a custom fab that's able to operate in a collapse situation.

[lukan]

Is your argument because we have not had a nuclear war yet, we will never have one?

Can you elaborate? I would like to have your confidence ..

And in general setting up a solar panel fab is maybe not the best prepper action, but for the point of distributing critical techologies for a potential reconstruction, I do see the point.

There is individual survival and general progress of the species.

[margalabargala]

There's exactly one scenario that results in the actual technological collapse of our species, which is all out nuclear war between the US and Russia. Which with the current presidential administration, is possibly less likely than it's ever been; why would Russia nuke its newest ally?

The chances of a nuclear weapon being used somewhere right now tactically I think are quite high. Russia in Ukraine, or Israel in Iran (or someday soon Iran in Israel), or between India and Pakistan. But none of those are sufficient to bring us to a point where home manufacturing of solar panels becomes remotely worthwhile.

[adrianN]

I believe it's optimistic to think that that is the only scenario. Consider the problems we had during the pandemic, which was luckily just a minor blip as far as possible global disruptions go.

[lukan]

The problem is, except for the very first ones in Japan, there were never any nuclear weapons being used in a major war exactly for the unknown consequences of the other players.

It is all interconnected. If one nuke is used, then there will be many on the other side applying pressure to also use a nuke. And so on. I assume much more countries secretly have nukes and the frontlines are somewhat blurry. Meaning, at the moment I am also not too worried, but if a nuke is used it will be a very high gamble, that it will be just the only one.

[margalabargala]

Most countries definitely do not have nukes. There are a handful that could have them in secret, or that maintain the materials to make them immediately if needed. But all of those combined would amount to no more than a few dozen, small, nuclear weapons. There are not a thousand Tsar Bomba size nukes secreted away.

If the US and Russia stood down and the rest of the world let loose all of their nukes, it would be insufficient to cause sufficient damage to the technological integrity of our species such that backyard solar manufacture becomes viable.

[lukan]

"Most countries definitely do not have nukes."

I did not claim that.

I claim it will be hard to limit the use of nuclear weapons.

Just like in the weapons itself, one ignition can trigger a chain reaction in the end forcing russia or US to take part in it as well. If all the people involved are level headed and able to think rational - it likely will prevented also in the future. But if the person in charge is already stressed (and old) and gets lots of pressure - this person, might then feel forced to press a button.

[margalabargala]

You said "I assume much more countries secretly have nukes".

I claim that beyond the open secret that is Israel, the number of countries controlling a right-now detonatable nuclear weapon who are not on the Wikipedia list of "countries with nukes" is less than 5.

[kragen]

Agreed. But one individual country makes 90% of the panels, and the others cost twice as much.

[margalabargala]

Okay, but again, it's a far cry from "the price doubles" to "make these in your backyard or you will not have them".

To make a good, efficient solar panel requires materials and equipment incompatible with backyard manufacture, especially in a collapse scenario.

It's a neat hobby, but if your goal is just "have solar panels", you are strictly better off buying them than making them.

[kragen]

Probably. But all of these questions are contingent on what has been invented so far.