In recent years Renewable Energy Sources (RES) have become a very important sector and the center of attention due to their dynamic contribution to modern energy issues, as they are the most efficient and clean energy technologies. They have an advantage because of their contribution to sustainability, viable development, countries’ energy self-sufficiency, diversification of energy mix and environmental protection. In addition, they are an effective investment opportunity. As part of the development and support of the investment projects in the field of Renewable Energy Resources, we are exploring, researching and highlighting the production potential, which is “hidden” in the normal functioning of the companies, and providing technoeconomical solutions that will increase the energy autonomy of the companies and make them less “vulnerable” to price fluctuations in energy products through independence from energy suppliers, always based on maximizing the return on investment (ROI)