Location: Westford, Massachusetts

Watts: 6,867

Monthly Production: 600 kWh

Date: October 2015

Between electricity savings and SREC income, this Westford, MA homeowner is going to see about $61,500 in his pocket over 25 years. Add in the boost in his property value due to solar and his total financial benefit after 25 years is $85,500. Deduct what he invested in his system, which has 21 SunPower all-black panels, and the net benefit is $56,600. Those are some serious numbers.