Analysis of the impact of location and orientation of the PV power plant on the time of return on investment

The article discusses the issue of the impact of meteorological, constructional and economic conditions on the profitability of micro photovoltaic power plants. In the first part of the work, real annual energy yields for installations working in various regions of Poland were determined. Based on them, the time of return of expenditures incurred on the investment was simulated depending on their size and the price of electricity available from the power grid, the changes of which were determined based on the developed forecasting models. The analysis shows that for the most optimistic variant, in which the gym produces 1150 kWh/kWp of energy per year and the cost related to the construction of the gym is only 2.2 PLN/Wp, the investor can count on the return of expenditures after 4-6 years. If, on the other hand, the power plant produces 750 kWh / kWp per year, the construction cost is 5.5 PLN/Wp is the payback period extends from 14 to 21 years.