Significant multidecadal variability in German wind energy generation
Data sets
ERA-20C, Daily http://apps.ecmwf.int/datasets/data/era20c-daily/levtype=sfc/type=an/
Twentieth Century Reanalysis (V2c): 4-times Daily and Daily Average Monolevel https://www.esrl.noaa.gov/psd/data/gridded/data.20thC_ReanV2c.monolevel.html
Renewable power plants https://data.open-power-system-data.org/renewable_power_plants/