New England's electricity grid faced challenges during a 2006 heatwave and investments in rooftop solar panels began around 2008 to 2010. These solar systems generated significant electricity during a recent heatwave. Rooftop solar helped save customers millions of dollars over one week. Energy efficiency measures also contributed to lower electricity bills.

On August 2, 2006, the temperature in Massachusetts hit 99 degrees with 65% humidity. New Englanders cranked up their air conditioners and fans like never before, setting an…

New England's electricity grid faced challenges during a 2006 heatwave and investments in rooftop solar panels began around 2008 to 2010. These solar systems generated…