Solar electric, or photovoltaic (PV) technology, makes use of the abundant energy in the sun, and has little impact on our environment. Photovoltaics can be used in a wide range of products, from small consumer items to large commercial solar electric systems. Commonly known as solar cells, individual PV cells are electricity-producing devices made of semiconductor materials that are often connected together to form PV modules. Modules, in turn, can be combined and connected to form PV arrays. These connected systems integrate easily with existing energy supplies.