Sotnyk, I., Sotnyk, M., Kurbatova, T., Prokopenko, O. and Telizhenko, O. 2025. Sustainable household energy supply: methodological approaches to making optimal economic decisions. Bulletin of V. N. Karazin Kharkiv National University Economic Series. 108 (Jun. 2025), 59-69. DOI:https://doi.org/10.26565/2311-2379-2025-108-06.