Location: Warren, Massachusetts

Watts: 9,810

Monthly Production: 927 kWh

Date: October 2013

This 30-panel system has SunPower 327-watt panels and Solectria PVI-6500 and PVI-3000 inverters. Wondering if solar is a good place to invest your money? Check out these numbers:

  • 7.8 years to break even
  • Average annual return of 8.3%
  • 20-year return of 166%
  • Average cost of solar electricity – 7 cents per kWh