You don’t want to be sending current up into the grid while workers are repairing it during a power outage. If you just plug some shit into your bedroom outlet, that will happen. You need to disconnect your house from the mains. Whole house generators are old news, but no, your bedroom wall plug isn’t rated to power your whole house, and no, you aren’t just electrifying your own wiring if you try to do so. Whole house generators aren’t hard but they aren’t this easy. And you should be suspicious at how magically simple it sounds to just plug a dynamo into your wall to power everything. It’s the kind of thing we would love to be true because it’s so elegant but there’s a little more to it.