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As urbanization intensifies and the demand for clean energy rises, Vehicle-to-Grid (V2G) integration has emerged as a vital element in advancing smart mobility and sustainable energy systems. V2G technology enables electric vehicles (EVs) to not only consume electricity but also discharge stored energy back to the grid during peak demand, effectively serving as mobile energy storage. This bidirectional flow enhances grid stability, supports renewable energy integration, reduces fossil fuel dependency, and lowers energy costs. This study examines key global case studies, demonstrating the environmental and economic advantages of V2G while addressing barriers such as regulatory limitations and technological constraints. Strategic solutions for effective adoption are proposed. Furthermore, analysis of average grid demand in Ludhiana from January to October 2024 reveals a stable consumption range (3.18–3.31 kWh), which supports predictable energy planning and efficient V2G implementation. These findings highlight V2G's potential as a cornerstone of future smart energy ecosystems.