I guess the point is that if your residential solar setup attempts to backfeed a dead grid, it will effectively see a short circuit which it, try as it might, w

I guess the point is that if your residential solar setup attempts to backfeed a dead grid, it will effectively see a short circuit which it, try as it might, will be unable to generate any voltage across, trip and your house is as dead as the rest of the grid. For this reason, I'd be most surprised if there's a single backfeed system in existence which doesn't isolate your house from the grid once the grid goes down. Edit: Finally got around to reading the blog post to the end and found that the author makes this exact point in the paragraph following the one quoted in the comment above.