Model S. Image source: Tesla Motors.The U.S. electricity industry has been in a no-growth mode for a decade now, and that's had some wide-ranging impacts on utilities and power producers. Wholesale power producers like Dynegy (NYSE: DYN), NRG Energy (NYSE: NRG), and Exelon Corporation (NYSE: EXC) have seen net income drop as renewable energy replaces formerly expensive peak electricity demand and wholesale power prices fall.