Hi @FloKo, particularly from an architectural perspective, work undertaken by the Open Energy Platform might be relevant. Some of the underlying projects were discussed at the last openmod workshop in Vienna as video 00:02:50 and video 01:52:50 (but mostly just the first half for that second video). That work might be a bit high‑level for your needs, but always useful to understand the wider game plan and align where sensible.
This preprint might be of interest and a bit more practical (but I could not see if and where it had been formally published):
- Fleischer, Christian Etienne (2022). “A data processing approach with built-in spatial resolution reduction methods to construct energy system models”. Open Research Europe. Version 2. Creative Commons CC‑BY‑4.0 license.
The article contains a good summary of data sources too.
Finally, in passing, I plan to distill those various YouTubes mentioned above and other material down into a narrated 40 minute video to make the material a bit more accessible — but that is a couple of months away. HTH R