Research on First Mini Solar Power Plants to Produce Electric Power on the South Serbia

The solar radiation and energy potential in Serbia is 30% higher than in Central Europe, and the intensity of solar radiation is among the highest in Europe. Specifically suitable are the condition for usage of solar energy in southeast Serbia where the annual average of global radiation on a horizontal surface amounts to more than 4.2 kWh/m2 a day. This chapter discusses four photovoltaic solar power plants, two having been installed in the territory of the city of Leskovac and two in the Bosilegrad territory. The research is based on geographical location of solar power plants, orientation, and inclination of the panels in respect to the horizontal surface. All the processed solar power plants have the capacity 30-40 kW. The chapter is projection of two years of researching and measuring data on the initial investments in order reach profitability and investment return period. The solar power plants that have fitted angle of 33° (Fortuna) give higher production of electric power than in those panels that have angle inclination of 10° (Domit).