The increasing demand for sustainable energy solutions has highlighted the importance of solar power in infrastructure development. The main aim of the current study is to evaluate the potential of wind and solar energy in 16 regions located in Burundi. The results indicate that wind power density is around 9 W/m2, falling under class 1 (poor). Further, the solar resource for the sites is rated as excellent. Hence, it is concluded that the selected places have a huge solar energy potential compared to wind energy. Accordingly, these regions are suitable for installing solar system projects in the future. Moreover, this study aims to investigate the techno-economic feasibility investigation of a grid-connected solar photovoltaic (PV) system with a capacity of 10 kW using the RETScreen software. The results show that the proposed PV systems are financially and economically viable, with an energy generation cost of $0.0821–$0.0873/kWh. The study highlights the significance of solar energy which can be considered as playing a very vital role in transport, street lighting, and household electricity generation use. By integrating PV systems into public lighting and traffic control infrastructure, cities can reduce energy costs, minimize reliance on fossil fuels, and enhance sustainability. Additionally, excess energy generated can supply nearby households, improving energy access and reliability.