By integrating electrical energy storage equipment into consumer facilities, greater flexibility is achieved in terms of powering the consumer, and it enables the consumer to control the download of electricity from the power system in accordance with current market prices. In addition, positive effects are also achieved from the aspect of the electric power system, since such consumers can participate in the provision of auxiliary services in the system if they receive an incentive for it. The paper explains the technology and ways of storing electricity, and the storage costs of individual technologies are listed. In addition, a computer program was developed that enables the calculation of the optimal way of powering an industrial consumer that has devices for the production (diesel aggregate or photovoltaic power plant) and storage (batteries) of electricity within its facility. Based on the known technical data on consumer equipment, that is, data on electricity consumption and the prices of the appropriate tariff model for a certain period, the profitability of different consumer power supply strategies was examined.