Theoretical and Real Efficiency of Monocrystalline PV Modules in a 2-Year Cycle

Abstract

This paper contains an analysis of operation of photovoltaic power plant in an annual cycle for years 2016 and 2017. Its operation began when the intensity of solar radiation exceeded the value of several dozen W/m2 and lasted up to several W/m2. During the energy conversion in PV power plant, the temperature of photovoltaic modules fluctuated in the range from −25 °C up to 67 °C. Based on the data collected regression models have been developed that explained changes in the amount of electric energy generated in monocrystalline PV modules, depending on the available solar radiation energy and external temperature.