[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.