Piotr Kułyk

Solar energy is a source of energy that can meet a significant part of the demand for heat and electricity. However, its acquisition is associated with high variability both during the year and on individual days. The construction of installations due to changes in tariff systems, investment costs and subsidy programs raises doubts as to their profitability. The aim of this study was to assess the profitability of photovoltaic investments for households, considering public financial support. This study used RetScreen Expert software 8.1.2.13 to perform the entire analysis and performance cost, risk and sensitivity simulations. Climate data were imported from ground monitoring stations or from NASA global satellite or analytical data. The conducted research showed the profitability of investments in photovoltaics, even without state support. Differences between regions were insignificant. However, the support system has changed, extending the period of return on investment.