For the Netherlands, recently the Nationaal Energie Dashboard was launched. It provides an API for predicted solar production, tailored to your address and the orientation of your solar panels.
Would be nice if this could be integrated in Home Assistant!
Edit: it seems the solar power predictions are not part of their API as of now.
That tool is useful, but I don’t think they have an API available for it (yet).
There is a API available: Handleiding API | Nationaal Energie Dashboard.
I’m now looking in to a rest api in HA but a integration would be so much nicer.
Yes, I am already familiar with that API documentation and have also started to realize a python package for a later Home Assistant integration. But I don’t see how you would get the same data as the solar energy forecast tool on their website 