The global shift towards renewable energy sources is pivotal for sustainable urban development, especially in emerging economies. This research aims to explore the integration of renewable energy systems into urban infrastructures in developing regions by examining case studies from South Korea, Zimbabwe, and Sudan. We employed a mixed-methods approach, utilizing both quantitative analyses of energy consumption data and qualitative interviews with local stakeholders. Our findings reveal that while technological advancements have made renewable energy more accessible, significant barriers such as financial constraints, lack of policy support, and insufficient infrastructure still hinder widespread adoption. The study highlights the importance of tailored policy frameworks and international cooperation to facilitate the deployment of sustainable energy solutions. We conclude that strategic investments in renewable energy infrastructure can significantly enhance urban sustainability, reduce carbon footprints, and improve the quality of life for urban populations in emerging economies.