Charged via rooftop solar panels, the cells form a network that provides a building with backup electricity and that utilities can tap during peak periods.
Enough unused roof space exists on commercial buildings in the United States to install 145 gigawatts of new solar capacity — nearly double the country's current total solar capacity, according to a new report.
The Harrisburg, Pennsylvania, project will turn into a green development with housing, commercial and co-working space for young entrepreneurs, and food grown on-site.
