Commentary: The changing face of electricity supply
….The immediate agents of change encroaching on the electric utilities are rooftop solar, installed by homeowners, and microgrids, where a group of alternative generators are linked together and hook into the utility grid as one entity.
Rooftop solar generation is growing exponentially, pushed by tax advantages, politics and the preference of individuals to embrace green alternatives. Large vendors, such as SolarCity, have made a business of leasing rooftop collectors to homeowners. Self-generation often makes economic sense, particularly if surplus electricity can be sold back to the electric grid: a practice called “net-metering.”