Description: The necessity for environmental protection, energy expenses decrease, establishment of independence and security in terms of energy supply at national and company levels and optimization of production of the companies for the improvement of their competitiveness are crucial for Bulgaria as a member state of the European Union. Do the photovoltaic systems have future in Bulgaria? Is there a real prospective for their implementation and development in Bulgarian enterprises and the public sector? The paper answers the questions about the requirements for using photovoltaic systems and the ways of financing projects aiming at implementation of renewable energy sources