Bangladeshi researchers have modeled the technical and economic potential of integrating rooftop solar PV across Dhaka Metro Rail's MRT Line 6, finding that a 20.38 MW system distributed across 21 sites could significantly offset auxiliary electricity demand while delivering strong financial returns. The system generates more than 25.5 GWh annually, avoids approximately 235,297 tonnes of CO2 emissions over 20 years, and has a six-year payback period, 234.1% return on investment, and a net present value of $20.05 million. The study, the first to pair detailed station-level PV design with zone-based hybrid optimization for a South Asian metro system, divided the city into three zones for localized system design, with Zone B being the most cost-effective and Zone C achieving a 70% renewable fraction without battery storage. Multiple universities in Bangladesh contributed to the research published in Energy Reports, highlighting the importance of grid sellback tariffs and solar irradiance in determining the optimal system architecture.
https://www.pv-magazine.com/2026/07/06/photovoltaics-for-metro-stations/