Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Development of a Method for Determining the Nominal Energy Capacity of Stationary Energy Storage Systems Based on the Secondary Use of Electric Vehicle Batteries A.V. SHALUKHO, A.I. CHIVENKOV, D.A. ALESHIN, P.A. ALESHIN The article is devoted to the problem of recycling of electric vehicle batteries in stationary energy storage systems. The problem of determining the optimal parameters for energy storage systems using recycled batteries is solved in the article. A methodology for selecting the optimal nominal energy capacity of energy storage systems is developed, based on minimizing the Leveled Cost of Storage (LCOS). This methodology accounts for the capital costs of batteries and the costs associated with their replacement during operation, depending on the depth of discharge and the permissible remaining service life at which the batteries are no longer recycled. Using the example of integrating an energy storage system based on nickel-manganese-cobalt batteries into a low-voltage electrical grid to smooth out peak loads, the authors conducted research and obtained the dependences of the nominal energy capacity, reuse period, and LCOS on the operating parameters of the batteries. It has been shown that the lowest LCOS values are achieved with an increased potential battery life and battery depth of discharge values that minimize the number of battery replacements during the calculation period. It is proposed to use the number of batteries in the storage device as an additional optimization criterion to reduce the storage device's weight and dimensions. Keywords: energy storage, battery, recycling, electric vehicle, energy capacity, depth of discharge. DOI: 10.25791/pribor.3.2026.1660 Pp. 50-57.