Location: Northbridge, Massachusetts

Watts: 7,194

Monthly Production: 575 kWh

Date: March 2016

This 22-panel system has cut the homeowner’s price of electricity in half, from 18 cents to 9 cents per kilowatt-hour. We calculate that by taking the final amount he invested in his solar after tax credits and incentives, and dividing it by the kilowatt-hours of electricity his system will produce over 25 years. Best of all? He is guaranteed that price under our 20-Year Performance Warranty. Doesn’t that sound better than wondering what rate change your utility is going to spring on you next month?