Dark Sky has added Solar Irradiance data as a beta.
Note:
The values are calculated, not measured. Dark Sky uses the position of the sun in combination with cloud cover.
Western Europe is not in Dark Sky's "primary region", therefore the data is not super-accurate.
Since it is a beta, the algorithms and therefore the values may change
I have done a qualitative analysis that compared these values with those measured by KNMI (Netherlands). The differences were significant (27% lower). I have notified Dark Sky and they will investigate and possibly update their algorithms.
You need to delete your cached files in order to include these new values (everything will have to be re-downloaded)
If Dark Sky were to update their values, the cache needs to be deleted again.
Coverage decreased (-0.2%) to 69.493% when pulling 8e837db858e39aaa52f4c5e92a0aa4b8b59019d2 on JrtPec:dark-sky-solar-data into aa994e71a9b36f2c726f966e38ffec261136542a on opengridcc:develop.
Dark Sky has added Solar Irradiance data as a beta.
Note: