@meatlotion @kate Your bill reflect the operation of the electric grid and it's overall availability : Windfarms requires interconnections and compensating power sources to ensure the grid frequency stability and power delivery when the wind is not blowing.
Incidently, past a significant share, the more wind you'll have on your electricity mix, the more *expensive* your bill will be!
https://www.pik-potsdam.de/members/edenh/publications-1/SystemLCOE.pdf