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Résumé : The purpose of the study was to determine how different approaches to battery module management affect the energy and economic characteristics of a local solar power system considering the actual consumption schedule, set charge limits, and tariff scheme. The method of scenario modelling of battery storage operating modes based on a digital twin was applied. It was found that the battery storage management parameters affect the import of electricity from the grid, the loss of solar generation, the relative cost of electricity, and the level of autonomy of the hybrid power supply system. The actual operating mode, basic control logic, minimum charge reserve, charging time, tariff structure, and battery storage capacity were compared. Based on the results of scenario modelling, it was found that changing the battery storage management mode affects the import of electricity from the grid, the loss of solar generation, the relative cost of electricity, and the energy self-sufficiency rate. In actual operating mode, imports from the network amounted to 25 kWh, the relative cost was 15.68 c.u., and the energy self-sufficiency rate – 49.91%. The basic modelling reduced the import to 20.88 kWh and the relative cost to 12.19 c.u., increasing self-sufficiency to 58.17%. The best economic result was obtained in the scenario with a decrease in the minimum battery reserve: imports decreased to 17.37 kWh, relative cost – to 8.69 c.u., and selfsufficiency increased to 65.19%. Increasing the battery capacity to 20 kWh provided the lowest losses of solar generation – 7.6 kWh and the highest self-consumption rate – 81.39%. The tariff-oriented regime showed that the economic effect depends not only on the volume of imports, but also on the time of electricity consumption from the grid. Practical significance lies in the possibility of using the results by designers and operators of local solar systems with a battery to choose rational settings for the charge reserve, charging time, tariff consumption, and the feasibility of increasing the storage capacity