The term entrepreneurial environment includes all institutional, legal, financial and public policy aspects that can support any type of business activity. These different layers can affect the growth or the decline of a business sector by the creation of incentives or barriers in the entrepreneur's actions.

This paper examines the Renewable Energy Sources (RES) business sector in Greece. In this research, we investigate the energy market, by analysing the administrative, financial, political and technological framework that covers the sector's operation, in the last two decades. The paper presents the progress of the renewable sources installation for the last twenty years. It also presents all the available financial support mechanisms that have been used in the promotion of relevant technology, the legal framework and the licensing process for the renewable projects, the taxation and the role of the banking system.

For this long period of time, we investigate the different political and economical situations that the country has faced and more specifically the paper describes the emergency political decisions that have been taken in front of the Greek financial crisis, during the last 5 years.

With respect to research methodology, in this review paper, we compiled all the appropriate data from all institutional organizations as well as we carried out a quantitative research with the participation of more than 80 companies which invested in different technologies in the RES industry.

The empirical results of the survey describe the strengths and the weaknesses of the sector and present the necessary initiatives that have to be taken by the state for the support of entrepreneurship and the facilitation of the creation of new investments in the energy sector in Greece