100% Renewable has Arrived

That's in one German state, not in the US, more's the pity.

Germany’s windiest area, Schleswig-Holstein, will probably achieve “100% renewable electricity” sometime this year. That is, its clean energy production will be able to supply all of its electricity consumption. Schleswig-Holstein has a goal to generate 300% of its electricity consumption with renewables eventually. This mostly rural area is grid-connected, so it can sell excess electricity and still use conventional power during periods when wind is not available.

Please explain that to me.