Location: Foster, Rhode Island

Watts: 7,590

Monthly Production: 717 kWh

Date: August 2017

Eighteen solar panels are visible in this photo, on the garage of this home. In addition, four more were tucked onto the main roof of the Cape. We recommend sizing your system to cover just about 100% of your electricity use. Sometimes, homeowners will go a little bit larger than that to accommodate future electricity load, such as an electric car or mini-split heating and cooling system. In this case, solar will cover about 94% of the owner’s needs.

And, that solar electricity will cost him 7 cents per kWh compared to the 19 cents he was paying the utility.