Bangladesh's growing dependence on fossil fuels and rising electrical demand lead to load shedding, highlighting the critical need for sustainable energy alternatives.  Solar photovoltaic (PV) technology is an achievable option for relieving pressure on the national grid and improving long-term energy security. This study examines the technological and economic viability of a 1.5 MW grid-connected solar PV system proposed for the World University of Bangladesh (WUB).  PVsyst simulation software was used to analyze system performance under real-world climatic circumstances like as solar irradiation, temperature, wind speed, and relative humidity. The findings suggest an annual solar energy availability of 3375 MWh.  The inverter-adjusted consumption is 2815 MWh per year, of which 2774 MWh are exported to the grid.  Over 25 years, the system is expected to produce 70.375 GWh of renewable energy and reduce CO₂ emissions by 33,074.061 tons.  The financial study illustrates good economic feasibility, with a payback period of 3 years, 2 months, and 13 days. The system also shows a competitive levelized cost of energy (LCOE).  The study identifies system losses, a 78.63% performance ratio, and operational issues, as well as insights into the successful design, optimization, and integration of rooftop solar systems.  In conclusion, the suggested solar PV system is technically possible, environmentally friendly, and economically viable for encouraging sustainable electricity generation in Bangladesh.