Twin Groves II Wind Farm, the second phase of Twin Groves I, is located in eastern McLean County, Illinois. This phase consists of 120 Vestas V82 1.65 MW turbines and has an installed capacity of 198 MW - enough to power approximately 60,000 Illinois homes with clean energy each year. Phase II began commercial operation in early 2008. Exelon Energy purchases the wind farm’s energy.