[mschuster91]

I'm talking about standard surge protectors. Properly installed they are enough except for direct lightning strikes, these will fry everything. But unfortunately, even in code-obsessed Germany landlords are not required to retrofit SPDs.

[0xbadcafebee]

To protect a large electrical device investment, you would want an EMP shield whole-home SPD, in addition to an SPD right at the electrical device. The first one shields exterior surges (including non-terrestrial), but the second shields against internal surges. And yeah lightning will blast through both of them. So the best bet is probably a lightning strike detector combined with renters insurance.