Innovation is recognized as a key factor in nations and firms competition and innovative firms are one of the perquisites for a dynamic and competitive economy. But firms face challenges and obstacles in path of innovation which different categories of these obstacles are presented. The purpose of this paper is studing innovation barrieers and determining the effects of them on different types of innovation in renewable energy firms. In this regard, innovation obstacles are identified and examined in terms of two categories of internal and external obstacles. Innovations are also divided into four categories of product, process, organizational and marketing. The research has been carried out among 154 renewable energy companies. In order to achieve these goals, at first, the research model was analyzed using factor analysis and path analysis technique and after assessing the fitting of structural models, the research hypotheses test was performed. The research results confirm six factors as internal barriers and six factors as external barriers. Among these factors, the lack of proper market identification and the lack of external resources to finance innovative activities have the greatest effect on the creation of each of the internal and external barriers respectively. Also, eight research hypotheses have all been accepted, indicating the impact of these two categories of barriers on all types of innovation in renewable companies.


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