Below are four links to maps that can be used to make an initial assessment of the amount of energy possible from a 1 kWp photovoltaic installation.

The procedure was as following: for each location in Poland – municipality geocoded with OpenStreetMap – hourly solar irradiation data was obtained from PVGIS-SARAH2 dataset, spanning a period of five years, from 2015 to 2020. Within this timeframe, the hourly data was aggregated by summing up the values. This cumulative data was then averaged to derive a representative value for solar irradiation over the five-year period. For each location four distinct calculations were performed varying the PV system configuration as follows:

  • calculation of PV power output was conducted for a horizontal PV system, where the panels were flat, disregarding tilt and orientation,
  • calculations were performed for a PV system appropriately for an east, south and west-facing orientation and a tilt of 35 degrees to explore the performance implications of the orientation and tilt angle widely applied in Poland.

The final results of calculation provide insight into the expected power output from a 1 kWp PV system under some configuration (azimuth, tilt) at different locations in Poland based on the averaged solar irradiation values that were employed to estimate the anticipated performance of PV system setup over the specified five-year period. As a 1 kWp PV system a crystalline silicon technology was adopted due to its efficiency, reliability, cost-effectiveness and popularity among residential, commercial and utility-scale solar installations.

Attention: These are large collections, also take a while to download.