From the reviews on the APC Symmetra PX 128kW Scalable for 3.5 million rubles:

He earned 5 extra million at concerts, decided to take this uninterrupted machine to the country instead of an apartment, put it in the basement. I did not regret.
of the plus:
Perfectly holds the whole house for 45 minutes-hour with working heaters, TVs, and washing machines. In case of power failure at the substation, you can quickly turn off the computer, pour water from the washing machine, and look at the TV.
It warms up and dries the basement. No more rot and moisture, with this device you can forget about mold.
Low-frequency noise perfectly expels rats, mice, and other impurities.
On the ventilation holes, you can successfully dry a variety of things, starting from the wardrobe, ending with phones of 1 million. The ruble. It dries quickly.
If you throw out all the electronic filling, you can use the device as a temporary dwelling, and if you bury it in the ground - then as a bomb shelter, the thickness of the walls and their reliability allow it.
Can be used to use the machine in the garage when the power is turned off. Until I tried, because I am lazy to pull a three-phase cable.
of deficiencies-
In the basement it became impossible to store vegetables from beds, as they just dry out. I plan to solve the problem by buying a separate refrigerator. and heavy. It was brought in the already assembled form, in order to get it stuck in the basement, it was necessary to dismantle part of the wall, and drag it with a tractor.