[tda]

Alternatively, you can get a plug-in battery with solar input and AC outlet for pretty cheap. In normal times, the battery is only connected to an AC socket, and tries to balance out my daily usage (includes a power usage monitoring device in the breaker box). If/when the fan is hit with brown stuff, I can plug a few of my solar panels into the battery directly (they are now wired to my basic inverter without island mode), and then I still have some backup power.

It is not a solution for everyone, but redoing all my electricity hook-up, getting a whole-house battery and a three phase backup option would easily cost 20k. And it would cost a tonne of space, cause all this battery and inverter stuff needs to be close to the main connection (where I don't have space). The solution I chose was only 1200 for a 2kWh battery with built in inverter for 4 panels. And the battery is actually portable, I could technically use it for camping. Output is limited to 1200W AC from battery, or 2000W AC when there is enough solar input. To me spending 1200 Euro to have some electricity in case of WW III (or some significant sabotage) felt worthwhile