A typical solar cell is about 6 inches long by 6 inches wide, with variations depending on the company of manufacture. When a series of solar cells are connected in the same circuit and housed in a single unit, it’s called a solar panel. So, while a solar panel looks like a single item, it’s in fact a collection or aggregation of solar cells. Likewise, when you look at the roof of a home with PV installed, you’re not seeing a single solar panel, but a group of connected solar panels. It’s this array of solar panels, each housing an array of solar cells, that provides enough electricity to run your home.