Invenergy LLC, a closely held renewable-energy developer, began commercial operations at Michigan’s largest wind farm.

The 212.8-megawatt Gratiot County Wind Project has 133 General Electric Co. (GE) (GE) turbines, Chicago-based Invenergy said today in a statement on its website.

DTE Energy Co. (DTE) (DTE), a Detroit-based power company, owns 64 of the turbines and Invenergy owns the rest. DTE is buying all the power from the wind farm under a 20-year contract, it said in a separate statement. 

By Ehren Goossens