This article presents an investigation of solar power plants’ economic efficiency in the case of energy prosumers. The economic effect of the development of solar energy, the environmental effect of the transition to green energy and the social effect due to lower electricity costs and investment growth from the use of photovoltaic installations (PVI) have been proven. The level of annual savings in PVI due to changes in production and own consumption of electricity are determined. Through use of factor analysis, the grouping method, the method of generalizing indicators, quantitative data collection for solar PV systems and the matrix method, the two main hypotheses were proven: (i) solar energy production should be stimulated by a sound state tariff policy; (ii) prosumers as players of the electricity market should be considered in the tariff policy. It is revealed that at current interest rates, PVI operational activity is subject to more complex factors, and the main one becomes economic, namely considering the economy of consumers, the level of taxation or grants of PVI activities, as well as productivity and the real state of technical condition of devices. The provided research develops the theoretical and empirical basis for the state policy of solar electricity usage with consideration to the peculiarities of its production and consumption. The process of production and consumption of electricity in PVI is not characterized by uniformity, which is derived from a number of factors, primarily from natural and climatic conditions. It also depends on the technical characteristics of the devices.

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 communities 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.