Do you know how these kits work?

Yes I do. Had one for some time before we got our own house and ramped it up to a “real” 8 kWp array.

If the feed back into the grid, they are not plug and play and will require coordination with your power company lest you accidentally kill someone because you’re backfeeding into a line they turned off so they could work on it.

Which is exactly why there are harsh regulations about the index of these things in Germany. Before you plug it in, you have to register exactly where you’re plugging what in.

These units do not push electricity into the grid unless their fail-saves are bypassed deliberately or fail catastrophically.

What are you talking about? Of course, energy that isn’t used in the household is pushed back to the grid.

Not at home and can’t try it, but for other racing games it’s enabled by default (Redout e.g.), so it shouldn’t really be much of an issue to turn it on.