how do you compare with Kachelmann and kachelmannwetter.com in terms of data?
For visualization, the UI there is great for a trained eye only, yours seems more accessible. Congrats on that point!
For visualization, the UI there is great for a trained eye only, yours seems more accessible. Congrats on that point!
It looks like Kachelmann is also integrating weather forecasts from different national weather services and the paid version from ECMWF. I am sure the "HD" forecasts mainly use DWD ICON models as well. In this case, data quality would be the same.
I also spend some time to carefully integrate local and global weather models. For solar radiation forecasts, a clear sky radiation model is used to correctly interpolate data to 1h resolution. In the end it is a tradeoff between simple API with low operation cost and data quality/amount.