World energy consumption is expected to increase by 56% from 2010 to 2040. Energy efficiency improvements are needed to obtain environmental benefits, as well as economic benefits. As companies are the major consumers of energy, organizational level solutions for energy efficiency would have significant benefits both for environment and economy. Energy Informatics (EI) offers a practical solution for energy concerns and leads to both environmental and economic benefits for the companies. However, we still know little about the antecedents of the adoption of EI. Drawing on the motivation-ability framework, the research on organizational IT adoption, and specific characteristics of EI systems, this study develops a theoretical framework to examine factors that affect the adoption of EI practices by companies. In doing so, it will be the first organizational-level EI adoption study, which also provides insights for the IS adoption literature.