The really awesome wind spots are more the coastal or offshore farms, which... well... we can't have (no access to the sea does that to you).
Solar is really really booming right now however, many houses take themselves off grid completely. Mine is a net producer for example.
All year? And do you mean you "inject" more than you "pull", or do you mean that you can live without ever pulling anything from the grid?
Because "being a net producer overall" doesn't say that it would work in practice if everyone was doing the same, right?
As such, as of now, the EU can shut down Switzerland without warning if the grid is overloaded and they need to avoid a blackout.