The energy sector is undergoing radical changes, and this transition is expected to accelerate all over the world over the coming years. In our recent research, we conducted a questionnaire survey at different levels and asked the experts in the area, the businesses involved in the issue, the operators and maintainers of existing systems, as well as the potential consumers and end users, about their knowledge and intentions related to renewable energy sources. Our empirical research can be divided into three parts. Our exploratory research was based on expert interviews, which show that the growing importance of localization is unquestionable, but the economic, social, and existing infrastructures impose significant barriers to the widespread adoption of certain technologies. Regarding the population survey, we see that the skepticism experienced in previous years has been replaced by a kind of expectation reflecting openness. In addition, it can be stated that in many cases technological development is faster than the possibility of its adaptation. Our gender tests significantly support men’s better knowledge of the subject and the fact that biomass (despite its major importance) is not one of the most known renewable energy sources.