In late June 2018, the firm said it would cut roughly 260 of the 480 jobs at Adwen over the next two years.
The move was forced following the merger of Siemens and Adwen's joint venture partner Gamesa in 2017.
Now, following a deal with the workers' union, Adwen has agreed to retain 211 jobs at its Bremerhaven base, northern Germany, "responsibly" cutting 166 full-time positions.
The outstanding figure of the 260 lost jobs includes temporary employees, those that have already left the company, and those that have been transferred to Siemens Gamesa.
"We very much regret the developments at Adwen, but in the interests of the workforce we have tried to find the best possible solution for our colleagues," said the chairman of Adwen's works council.
"The works council has designed the negotiations with the management in a target- and result-oriented manner and achieved an acceptable result from the viewpoint of the works council."
The deal includes a volunteer programme with "appropriate compensation payments" to help workers transition in to new jobs.
A so-called transfer company has also been set up, of which affected employees can remain part of for 12 months and receive training and support for a new profession, Adwen said.