Background: The energy markets of Southeastern Europe largely depend on fossil fuels. Energy prices are lower in this region than in the rest of Europe, while the energy transition is relatively delayed. This paper aims at summarizing the obstacles to the civic energy transition in Southeastern Europe and the future prospects for its success. Results: In Southeastern Europe, there are great concerns about the uncertainty of the energy transition process and its outcomes. There is a lot of apprehensions that the transition could drift away from the citizens and end up in the hands of large-scale solar and wind farms entirely. In other words, citizens may be completely excluded from participating in the energy transition. Renewable energy cooperatives can serve as a crucial vehicle for organizing and engaging citizens in the energy transition. They can also be used as a lever of civic influence. This influence is crucial for ensuring a fair transition. The research methodology on cooperative development includes a literature review and a survey conducted with 240 participants. The participants were local government officials, members of NGOs, businesses, scholars, and citizens. The paper summarizes the answers to the questions which the authors considered essential for deepening our understanding of citizens’ attitudes on a (just) energy transition. The results show that the public awareness about the energy transition has increased. In addition, participants have demonstrated a willingness to take action, both as individuals and through cooperative efforts. However, they have also shown a great level of mistrust in the government, mainly due to perceived corruption and lack of transparency. Generally speaking, they have doubts that the energy transition can be completed in a fair and timely manner within their national context. Conclusions: This paper provides insight into the current state of affairs and the prospects for the energy transition based on the attitudes of the citizens in Southeastern Europe. The paper argues that energy cooperatives should be employed as a training ground for the citizens, since, through joint actions, their trust in each other can be regained, rehearsed, and restored.

The costs related to the operation of street lighting can be significant expenses for municipalities; therefore, it is very important to take advantage of opportunities for improving energy efficiency. In this paper, the authors studied the effects of the implementation of energy efficiency measures in a street lighting system. Different scenarios, including replacing luminaires, replacing inefficient lamps, and installing a dimming control system, are analysed. The model includes a detailed analysis of the techno-economic characteristics of both LED street luminaires and LED corn bulbs available on the market. The results show that the replacement of low-power, high-intensity discharge lamps with LED corn bulbs is an economically favourable solution that provides desirable economic project parameters with relatively low investments. Moreover, in the case of a relatively low price of electricity for street lighting, it is the preferable solution in most scenarios.

Sustainable housing is a worldwide challenge, while the case of Serbia could be an example of how complex the circumstances can be and how difficult it is to see the path towards sustainability. This paper sets out to answer multiple challenges; can energy-efficient, low-impact housing enter the market and respond to the needs of its population, potentially contributing to a more affordable and future-proof housing reality in Serbia? And does this demand rather different measures than the ones conventionally explored in innovative housing approaches elsewhere? To answer these questions, the paper starts from the preview of circumstances, then the methodology is proposed and explained, after which the possible building materials and technical installations for pilot multi-apartment Passive House are selected, and in the end, results are given and conclusions are drawn. Since the building is intended for a housing cooperative, both the affordability of the proposed solution and the environmental footprint has been comprehended by the methodology proposed. In the end, by carefully balancing the benefits of individual measures - favouring those that are cost-effective and discouraging the implementation of measures that are not, a viable pilot project that could step into the market-oriented society is selected.

This paper analyzes the potential for deep renovation of an apartment building to the level of a passive house in different contexts in the continental part of Europe. The examined variables include different local climatic conditions, levels of economic development, and levels of market development (energy prices, energy footprint, labor prices, etc.) as well as different energy efficiency retrofit scenarios in four different countries. The adequate methodology was developed here in order to obtain an optimal solution for deep renovation in each context. The proposed methodology was based on the interaction of energy simulation and mathematical optimization. In this model, the energy performances of a building are determined with the EnergyPlus package and the optimal solution was obtained by using a mixed-integer non-linear programming model. The results demonstrate that the optimal solution for each analyzed location cannot provide cost-effectiveness over the lifetime of a building, so the introduction of additional subsidies or incentives, such as carbon taxes and upfront subsidies, is necessary.