SolarCity to develop roofs made of solar cells

Five million roofs are replaced each year in the U.S., so instead of simply swapping out old shingles with new ones, why not turn the whole roof into a solar power generator that's integrated with your home's electrical utility?
That is SolarCity's plan for a new product it expects to begin producing next year, according to statements made during the company's second-quarter earnings call last week.
During the call, SolarCity Chief Technology Officer Peter Rive alluded to a new product that wou