This paper explores the rapidly evolving landscape of renewable energy technologies and their integration into the electrical grid. As the global demand for sustainable energy sources intensifies, the deployment of renewable energy systems, such as solar, wind, hydro, and geothermal, has grown exponentially. This surge in renewable energy capacity has necessitated the development of innovative grid integration strategies to address challenges like intermittency, variability, and the need for energy storage solutions. The paper delves into the technological advancements that have facilitated the seamless connection of renewable energy sources to the grid, including smart grid technologies, energy storage systems, and demand-side management. It also examines the policy and regulatory frameworks that support grid integration, highlighting the importance of coordinating actions across various levels of government and industry stakeholders. Through a critical analysis of case studies from different regions, the paper identifies best practices for renewable energy grid integration and offers recommendations for future research and implementation to ensure a sustainable and reliable energy supply.