One of the fundamental concepts of home solar is grid interconnection - otherwise known as connecting to the grid. What does this mean? First, let’s define exactly what “grid” means. When talking about home solar, the grid refers to the power grid, also known as the electric grid. It is the collection of machinery and wires that generates electricity and brings it to your home. There are two parts to the grid: generation, which consists of a variety of power plants such as coal plants, gas turbines, nuclear power plants, wind turbines, hydroelectric dams, and solar panels.