I have recently published a Python notebook illustrating how to create a model for all the European power systems using only open data and tools.
Basically, selecting a list of countries and a period (for example from 1st January 2021 to 1st February 2021), the code creates the inputs needed for the PyPSA open source model to simulate the hourly behaviour of the European power systems, based on the data from ENTSO-E (for electricity generation, infrastructure) and from Copernicus Climate Change Service (C3S) for the meteorological-derived variables (e.