The aim of the article is to consider current global and European trends in ensuring a sufficient level of energy efficiency, to provide an analysis of the institutional environment for energy security, and the development and justification of a conceptual and analytical model of energy generation and consumption at the regional level in decentralization reform in Ukraine. The current trends of world energy consumption are illustrated, the forecast of renewable energy development is built and an analysis of energy efficiency of the national economy is performed. The article presents a study of the formation of an integrated municipal energy-management system of Ukrainian com-6 munities and municipalities depending on their urbanization and offers the use of conceptual analytical model of generation-consumption. A number of normative and organizational-institutional proposals on the standardization of energy-efficiency improvement processes are provided. Analysis of the energy efficiency of communities can be modeled at the conceptual level with the study using an analytical model: a) energy-efficiency factors of this model, financial instruments for its effective functioning as a mechanism of interest budget revenues and specialized funds functional dependence of the target function of the energy generation-consumption model, taking into account the generation methods and the main consumers at the appropriate levels; b) the risks and shortcomings of this process, which propose a number of regulatory and institutional changes to improve the effectiveness of effective energy efficiency policies of communities and energy security of the state on the basis of energy cooperation and organization of the biofuel exchange. The model of organization and functioning of the cooperative for generation and consumption of solar energy, which is based on the regulatory framework, is represented as a model structural and functional solution. This allowed the development of scientific and applied recommendations for improving the legal provisions, which would allow the community to become an effective player in the wholesale energy market, selling it at a "green" tariff.

This study contributes to the creation of a model of effective economic relations by the organizer—the outsourcer between the participants of the regional ecological financial system—financial services clients, creditors, investors, insurers, and municipalities. This study proposes to reduce the financial limitations of business entities that are environmentally active by forming a regional ecological financial system, organized by an outsourcer for the provision of financial services. The outsourcer attracts financial instruments (FIs), including special environmental financial instruments (GFIs) and financial management mechanisms (FMs), to accelerate capital turnover. When calculating the financing models, the well-known concept of the innovation life cycle was used. Research on the relationship between variables “revenues from environmental taxation by country” and “the sum of all environmental revenues” in the EU27 budget for the period 2012–2021 made it possible to determine the Pearson coefficient, according to which countries were distributed according to the degree of connection strength according to the Chaddock scale: 32% of countries had a very high connection (0.9–1.0) during the study period, and 53% of EU countries had a noticeable and moderate connection (0.7–0.9). The proposed method for studying the relationship can be useful in managing financial flows attracted to the ecological financial system by an outsourcer.