Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. OFfshore wind energy also has great potential in Germany. WInd speed at sea is 70 to 100% higher than onshore and much more constant. A New generation of 5 MW or larger wind turbines which are capable of making full use of the potential of wind power at sea has already been developed and prototypes are available. THis makes it possible to operate offshore wind farms in a cost-effective way once the usual initial difficulties of new technologies have been overcome.ON July 15th of 2009, the first offshore German windturbine completed construction. THis turbine is the first of a total of 12 wind turbines for the alpha ventus offshore wind farm in the North Sea.