Abstract: The article examines the specific features of the formation and development of green entrepreneurship in Ukraine under conditions of military and economic instability, with a focus on its importance for strengthening energy security. The main objective of the study is to identify and substantiate the role of green entrepreneurship as an effective mechanism for enhancing the energy resilience of enterprises and ensuring energy independence both at the level of individual business entities and at the national level. The paper generalizes and systematizes scholarly approaches to the interpretation of the concept of «green entrepreneurship,» which makes it possible to define it as an integrated business model combining environmental innovations, efficient resource use, and economic feasibility. A bibliographic review of foreign academic publications demonstrates that research on alternative energy dominates the field of energy security studies. An analysis of statistical data on losses in the energy sector and changes in electricity production in Ukraine revealed structural transformations in the energy balance and an increasing role of renewable energy sources. Particular attention is paid to the development of alternative energy, which shows positive dynamics even under conditions of military instability. This sector can serve as a foundation for achieving energy independence both at the enterprise level and within the national economy. The study proposes a model of energy autonomy for a typical Ukrainian enterprise based on the combined use of solar, wind, and bioenergy sources. It also includes an assessment of the required investments and estimated payback periods. The findings confirm that the implementation of such solutions is economically viable in the medium term and particularly promising for enterprises in the agricultural sector. It is concluded that the development of green entrepreneurship contributes to the diversification of energy sources, reduces dependence on imported resources, and enhances Ukraine’s energy security, provided that comprehensive institutional support and adequate investment are ensured.