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.

ALBANY — National Grid is in the process of installing so-called smart meters at the homes of its gas and electric customers.

They’re called smart meters. And both Con Edison and NYSEG utility companies say they are a way for customers to keep watch on energy use and to save money. Con Edison said on its website it has ...