Bangladesh, a country with a developing economy, grapples with significant energy hurdles, with rural areas like Netrokona experiencing acute electricity shortages. This research explores the deployment of rooftop solar photovoltaic (PV) systems as a sustainable solution to these energy issues, focusing on Netrokona Govt. Mohila College as a case study. Using simulation software, the study conducts a detailed assessment of the energy requirements and load profiles of the institution to determine the optimal size and configuration of the PV system. The designed system aims to generate 44.50 kWp, with a specific annual yield of 1226.83 kWh/kWp and a performance ratio of 82.21%, producing a total of 53,180 kWh annually. The implementation will significantly reduce grid dependency, with 5,460 kWh used on-site and 47,129 kWh exported to the grid, achieving a self-sufficiency level of 97.4% and minimal grid energy import of 163 kWh annually. An economic analysis over 20 years reveals the financial viability of the project, with an initial investment of $66,750 offset by increasing annual returns from feed-in tariffs and electricity savings, resulting in positive cash flow from year 11 onwards. Additionally, the system offers substantial environmental benefits, reducing CO₂ emissions by 23,657 kg annually. Monthly performance variations due to irradiance and temperature fluctuations are also considered to optimize efficiency. This study underscores the potential of solar PV systems to address energy shortages in rural Bangladesh, offering significant long-term economic and environmental benefits.