Germany’s offshore wind capacity factors

Posted by – 2017/05/05

Previously I’ve provided the figures for Danish offshore windfarms, and for the UK too. Now here are the numbers for the larger German offshore windfarms. The ones shown here are the only ones I’ve been able to get detailed data for, so far.

German offshore wind capacity factors

All numbers are to the end of March 2017. Analysis by
Age (y)Installed
elec. gen.
Power per
unit area
spanned (W/m2)
Rolling 12-month
capacity factors
Total37.9%41.2%18149 1143.3
Amrumbank West42.2%46.0%1.43021 6194.2
Borkum Riffgrund I39.6%43.1%1.53121 7383.7
DanTysk57.8%51.1%1.92881 7902.2
Nordsee Ost 137.0%37.0%1.91448753.0
Nordsee Ost 237.1%37.1%1.91448853.0
Windpark Baltic 1 & 243.6%46.8%1.43361 9564.3

Load duration curves

I’ve constructed for each of the offshore windfarms for which there is detailed hourly data. Use the pause and play buttons to stop and start the sequential display of curves. Click on the windfarm name in the legend to toggle the display of that farm’s curve.


Note that for each individual windfarm, its curve is based on data starting from the date that the windfarm was fully commissioned.

The numbers for DanTysk did look strange: I had to clean a stretch of five months of data that was clearly wrong. A small kink remains in its load duration curve; this may be an artifact of some of the problematic data.

Windfarms less than a year old are excluded from the calculations of the power density per unit area spanned. The figure for total power density is a weighted average of the windfarms that are a year older or more: this is weighted by size, but not by time. So a windfarm that’s twice as large contributes twice as much to the total; whereas a windfarm that’s twice as old, does not.

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