Location: Harvard, Massachusetts

Watts: 13,400

Monthly Production: 1145 kWh

Date: December 2013

This neat and tidy system looks deceptively compact. It actually has 40 SunPower 335-watt panels for a whopping 13,400 watts of renewable energy capability. Two Solectria PVI-6500 inverters convert the solar energy from DC to AC use in the home.