The received solar irradiation is converted to electricity through photovoltaic phenomenon and used for covering electricity needs. Depending on the presence of electricity grid, the PV systems could be categorized into on-grid and off-grid systems. Grid connected systems are electrically connected to the electricity grid and the energy produced is utilized for energy-electricity savings. The off-grid systems are employed in areas with no access to the grid and the energy produced covers the overall electricity demand of the loads connected to them.