More and more businesses are concentrating on renewable resources and the different technologies connected. It is a field that, because of the price erosion of renewable resources on the one hand and the wish to fulfil ecological goals on the other hand, constitutes a strong mainspring developing a cluster. But this relatively young cluster still is a “lone fighter”. The distribution of information, the promotion of co-operations and training measures are important factors for advancement. The cluster is of high ecological relevance but also increasingly relevant for employment.