The article reveals the relevance of the Russian enterprises energy supply problem in the context of significant changes in the relationship between producers, electricity suppliers and consumers, and also revealed a new configuration of relations and tools for their optimization. It is shown that energy supply is one of the most important Russian enterprise functional subsystems, whose high costs lead to a decrease in the products competitiveness. The existing models of interaction between the energy market subjects and the features of the pricing process act as the methodology. The study found that the organizational form of interaction between the consumer and the electricity supplier selection depends on its relative efficiency, and the costs associated with the interactions form depend on the consumer behavior and on the objective properties of the factors market. A method for selecting the energy supply source and suppliers is proposed, which allows tracking structural, market and regulatory changes.