Interactive maps of new windmills in Bayern and Germany

Keywords, tags: wind-power windmill wind-turbine Germany Bayern maps

For maps of new windmills in Bayern and Germany, go to
https://denis-bz.github.io/New-Windmills-in-Bayern/ or
https://denis-bz.github.io/New-Windmills-in-Bayern/newwindmills-DE.html
These maps show windmills running since 2024, or planned: in Bayern 333, in all Germany 8263. Looking at these sites is more interesting than looking everywhere — importance weighting. The data is from 1 January 2026, https://www.marktstammdatenregister.de/MaStR Gesamtdatenexport_20260101_25.2.zip .

These new windmills are BIG, around 250m: e.g. 167m turbine height Thi + 80m Rotor diameter / 2. Zoom in on ones in your area.

Files BY-*.csv and DE-*.csv under https://github.com/denis-bz/New-Windmills-in-Bayern have 1 line for each windmill, like

Cosmowind175 Cosmocap175  AGS State   MW     Lat     Lon Thi Rotor       Date             Lkr
5.79         29          9371    BY 4.26 49.5114 11.9894 160   138 2027-12-31 Amberg-Sulzbach
...
5.69         28          9679    BY    6 49.7377 9.69521 162   175 2026-05-18        Würzburg

Here Cosmowind175 is the average windspeed at each site, from hourly data under https://opendata.dwd.de/.../cosmo_rea6 in 2014. Cosmocap175, capacity factor or cap factor, is calculated per hour with a power curve for wind turbine type E-160/5560, then averaged over a year (see below). This is shown in the map popups (hovers) and in the .csv files.

How profitable are windmills in Germany, from EEG tax money ?

"Installed power", Installierte Leistung is the maximum a windmill can generate, at windspeeds around 40 km/h. Over a whole year, the electricity actually generated might be 20 % to 50 % of the maximum. This is called "capacity factor" or "yield" (Ertrag). It varies a lot, depending on actual windspeeds at a given site, and on turbine type and height.

In Germany, wind power, solar power etc. are subsidized with around €20.000.000.000 per year out of the Federal Budget, tax money; see Erneuerbare Energien Gesetz . New onshore wind turbine owners get about €70 per MWh from the EEG, guaranteed for 20 years. As I understand it, if the market price is 1/4 of that, the taxpayer pays the remaining 3/4. But only the windmill owners (and a few insiders) know how much electricity each windmill actually generates. This makes intelligent planning — more wind power where there's more wind, more solar power where more sun — difficult.

Capacity factor, TL;DR

https://wind-data.ch/tools/powercalc.php shows clearly, interactively, how power production (capacity factor) MW/max can be calculated from a windspeed distribution and a power curve for a given turbine type. That site uses a rough model:
yearly average windspeed * Weibull factor * power curve.

Cosmocap175 in the map popups (hovers) and in the .csv files is calculated from hourly windspeeds in 2014:

1. MW in each hour = windspeed in that hour * power curve
2. average over the (24 * 365) hours in a year
3. divide by the maximum possible, e.g. 5560 MW for turbine type E-160/5560.

At the 8000-odd sites of new windmills in Germany, windspeed --> capacity factor for a E-160/5560 varies linearly, like this:

 [5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5]  average windspeed m/s
  [22  26  31  36  40  45  50  55]  capacity factor, % of max

Comments welcome

Click on "Discussions" above.

cheers
— denis
2026-03-03 March