Duke Energy's renewable energy capacity grew by almost 20 percent in 2017, according to the company's newly posted Sustainability Report. One of the company's sustainability goals is to own, or have under contract, 8,000 megawatts (MW) of wind, solar and biomass capacity by 2020. Over the past year, the company has made strong progress toward that goal, growing its renewable energy capacity from 5,400 MW to more than 6,400 MW, which can power more than 1 million homes at peak production.