The electric power industry is at the dynamic development stage, which is accompanied by reconstruction and modernization of fixed assets. It is necessary to understand that this process leads to the risks that the company will bear in the innovative projects implementation. In this regard, the issues on electric power enterprise efficiency management are relevant. In addition, in market economy, the factors of both external and internal environment can affect the efficiency of an enterprise. The set of these factors, as well as the strength of their influence can vary depending on the industry and enterprise's activities. In this regard, the purpose of this study is to formulate a system of recommendations for managing the efficiency of an electric power enterprise. The object of research is the electric power enterprise of IDGC of the North-West, PJSC. The result of the study is an econometric model, which describes the influence of external and internal factors on the electric power enterprise efficiency. The recommendations developed on the basis of this econometric model are relevant for the construction of strategies and management systems for the efficient operation of electric power enterprises.