Solar panels on the roofs and yards of homes and businesses cut New England’s total electricity demand by a full 5% last year, according to the folks who run the six-state power grid.

OAKLAND, Calif., Dec. 4, 2001 — The Alameda County Board of Supervisors announced today that it is expanding what is already the nation’s largest rooftop solar electric system, located atop ...

"But [solar] hasn't been without consequences at the system level. "As rooftop solar installations have continued apace, [daytime demand for power from the grid] has dropped lower and lower ...