PyPSA was already coupled to the IEA's Global Energy and Climate (GEC) Model for some of the analysis in the World Energy Outlook 2023, as well as our weather processing too atlite iea.blob.core.windows.net/assets/ff3a1...

PyPSA offers commercial-grade functionality, easy customisability, easy deployment, no licence fees (WHAT did that PLEXOS licence cost???) and great community! More on PyPSA here: github.com/pypsa/pypsapypsa.readthedocs.io