Most homes already have a smart meter that digitally communicates with the electric grid. If you're looking to get rooftop solar panels, a smart meter is an essential piece of equipment. Here's why.

Technically, the output of a residential solar panel can be anywhere from 100 watts to 500 watts, depending on the capacity of the equipment and its operating conditions. Most solar panels on homes ...

Harvard engineers have built a solar harvester that automatically toggles between producing heat and generating electricity ...