Solar photovoltaic (PV) modules generate electricity from sunlight, which can be fed into the mains electricity supply of a building or sold to the public electricity grid.Photovoltaic solar panels absorb sunlight as a source of energy to generate direct current electricity. A photovoltaic (PV) module is a packaged, connected assembly of photovoltaic solar cells available in different voltages and wattages.Photovoltaic modules constitute the photovoltaic array of a photovoltaic systems that generates and supplies solar electricity in commercial and residential applications.The most common application of solar energy collection outside agriculture is solar water heating systems.