It's possible that the German factory that paid for this PR puff-piece will be able to bring their cost to within 10% of that of Chinese vendors, or even lower. If that happens, the result won't be a world of locally-produced solar modules; the result will be a world of German-produced solar modules, and there may be articles in the Chinese press lamenting how China is now importing PV modules from Germany.
Generally things are locally produced when shipping costs, tariffs, or risks would make overseas-produced versions economically uncompetitive. Potable water (0.03¢/kg) is usually locally produced at the 10km scale. Construction sand (3¢/kg) and aggregate (1¢/kg) and liquid oxygen and nitrogen are locally produced at the 100km scale. (The liquid gases are expensive to ship because they boil off during shipping.) Portland cement (10¢/kg), natural gas, and electrical energy are locally produced at the 1000km scale. Things that cost more than US$1/kg are, by and large, not locally produced.
PV modules cost about US$2/kg, so if shipping costs stay the same and war doesn't break out, we shouldn't expect to see them locally produced in non-protectionist countries until their price falls by another order of magnitude or so, maybe in 8–16 years.
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† I think the real number is closer to 5% than 10% (see https://news.ycombinator.com/item?id=26598814), but the article carefully avoided including any objectively verifiable numbers so we could find out whether I'm overlooking something.