They probably just trade it. Increase their supply so they can sell enough excess back to the grid to make up the cost later. You effectively get 100% wind, but

They probably just trade it. Increase their supply so they can sell enough excess back to the grid to make up the cost later. You effectively get 100% wind, but in reality you might have got 80% wind, 20% gas and sold some wind back to the grid. It's a good interrim solution at least.