Our energy system is evolving and will look very different in years to come from what we have today. Electricity produced by solar, wind, and other renewable technologies will power our cars and provide efficient heating. Homeowners and businesses will anchor an integrated grid with power flowing between consumers and among smart appliances and batteries within energy-sipping buildings. The transition is underway. In 2013 more renewables came online than coal, oil, and natural gas generation combined, and financial analysts think there is no going back.