The purpose of this research is to determine the correlations between the capacity of the solar power station, the energy generated by it, and the investment made for the installation of the station based on the correlationregression analysis. Within the framework of the research: these are the basic financial ratios calculated, the knowledge, which is necessary to determine the profitability of the project (NPV, IRR, Payback Period PI). Furthermore, the paper, based on certain assumptions, shows how the increase in investments in renewable energy (solar) sources could affect the energy sector.