Between 2011 and 2016 photovoltaic sector in Poland was characterised by continuous and dynamic growth. The country's cumulative installed PV power increased from 1 MW up to 187 MW, whereas the amount of PV-generated electricity expanded from approximately 0.01 GWh to 124 GWh. The most important factors influencing this sector's growth are liberalisation of Polish energy law and financial resources, as well as continuing decline in photovoltaic installation costs, for both commercial and noncommercial prosumers. In 2018, the average cost of installing 1kW of photovoltaic system was between 4000 PLN and 6400 PLN (with average 5000 PLN). Such price fluctuations are caused by the quality of PV modules and inverters, changes to assembly techniques, competition in local markets and selection methods.