Sri Raghavan Kothandaraman peered eagerly at the computer screens set up in a white ComEd truck parked in Bronzeville. If all went well, the screens would show that ComEd’s long-awaited microgrid ...

You already know that a smart thermostat can help you save energy in your home and that an electric car can cut down on planet-warming greenhouse gas emissions. But you might not know that these ...