As it arises from the reports of RWE Polska and the Institute for Renewable Energy a role of renewable energy sources in Poland increases. Obvious development of the renewable energy sources is clearly visible based on the example of the photovoltaic sector. Instability of regulations, uncertainty of subsidies in 2016 and unclear conditions of support for the investors for 2017 had not stopped technological development within the scope of micro installations and more powerful photovoltaic systems. The newest research carried out by the Institute for Renewable Energy (report of May 2017 concerning year 2016) indicates that there is great potential in the Polish PV sector.  Production capacities of tested companies were equal to 143 MW/year in 2016 and were used only in approx. 20%. Furthermore – they can significantly increase in 2017 to 223 MW/year because of development of production lines.