Solar power is the result of solar energy which is captured from sunlight and converted into electricity which is either stored in batteries for use at a later date, or diverted directly to the building for immediate use. In some cases excess energy may be sold to “the grid” for additional income or to supplement and reduce the standard energy that may be used from existing power sources. Commonly, this process is accomplished with photovoltaics (PV), a device which converts sunlight into electricity through the utilization of materials that produce electric current when exposed to light (a phenomenon known as the photovoltaic effect). Small electrical devices called PV cells, or solar cells, carry out the PV process. Solar cells are arranged in arrays called solar panels, or solar modules, that are mounted on a stand or bracket and installed in an area with substantial sun exposure. Typically, several solar panels are connected to form a PV system, or solar power system, that is utilized to provide some or all of a building’s energy needs.