The aim of this study was to identify and systematise effective managerial decisions aimed at aligning energy and investment processes in Ukraine with the requirements of innovative and sustainable development. The methodological basis of the research comprised comparative-structural, institutional, and regulatory-legal analyses, a problem-oriented approach, case analysis, and descriptive-analytical generalisation of the practice of implementing investment projects in the renewable energy sector. The main findings of the study demonstrated that in 2022, the volume of capital investment in Ukraine’s energy sector declined by 49% compared with 2021; however, investment activity began to recover as early as 2023, with total capital investments reaching UAH 109.3 billion. During 2022-2025, annual investments in renewable and low-carbon energy amounted to USD 1.09 billion, whereas in the pre-war period their cumulative volume exceeded USD 12 billion. The share of renewable energy sources within the investment structure of the energy sector remained within the range of 1-5%, while the structure of investments was characterised by the predominance of solar generation (60-70%) and wind generation (20-30%). In 2023, investments in solar power plants for businesses amounted to approximately USD 150 million, providing profitability of 15-20% and a payback period of 5-7 years. During 2022-2025, more than 2 gigawatts of new capacity were commissioned, contributing to a reduction in CO₂ emissions by 5-7 million tonnes annually. The study developed practical recommendations for improving the management of energy and investment processes, based on a portfolio approach, long-term contractual models, and the reduction of military and regulatory risks. The practical significance of the research lies in the possibility of using its findings by public authorities, energy companies, and investors to substantiate managerial decisions in the field of renewable energy in Ukraine
renewable energy sources; investments; energy efficiency; management; bioenergy; sustainable development; financing