In 2024 I have written a Dutch note about solar panels. Today I have translated this note into English. The title of the note is: "Output of solar panels pointing to the south depending on the slope and the month". Figure 1 out of this note shows in one view the influence of six different slopes and the month on the average power for a peak power of 10 kW for The Netherlands. For other countries the graph will be different but everyone can make a new graph using the given website of PVGIS Europe. The note can be found on my website:
www.kdwindturbines.nl at the bottom of the menu KD-reports.