OPTIMIZATION OF SURPLUS ELECTRICITY MANAGEMENT FROM MUNICIPAL PHOTOVOLTAIC SYSTEMS: VIRTUAL STORAGE VS BATTERY SYSTEMS: UDC: 621.311.243:[621.316.11.015:621.354](497.7). etima [Internet]. 2025 Oct. 27 [cited 2026 Apr. 27];3(1):43-52. Available from: https://js.ugd.edu.mk/index.php/etima/article/view/7558