MIRPOWER prepared a grid connection and capacity assessment for a 150 MW / 600 MWh standalone Battery Energy Storage System project in Uzbekistan. The study evaluated the technical suitability of connecting the BESS to the confirmed Sherobod 2 substation, while the final physical plant location remains under confirmation. The assessment was performed in DIgSILENT PowerFactory using 2027, 2030, and 2036 planning scenarios. MIRPOWER reviewed regional grid topology, transformer capacity, transmission line loading, renewable energy curtailment issues, system flexibility needs, and local Surkhon-area operating conditions. The study also assessed charging and discharging operation modes, including peak shaving, valley filling, renewable energy accommodation, and support for reliable grid operation. Several BESS capacity and storage-duration options were reviewed to confirm the technical suitability of the proposed 150 MW / 600 MWh configuration. Normal and N-1 contingency simulations were performed to identify local grid constraints, especially around the Sherobod–Surkhon interface. The results provide a technical basis for grid-connection approval, capacity confirmation, and next-stage engineering development of the standalone BESS project.