The solar panels are connected to metro yard substation, which feeds the connecting metro lines. The electricity generated by the solar plant in one year can support about 200,000 km of travel for a Line 2 train with 8 cars, which is equivalent to more than 1,560 round trips of. The hangar rooftop is covered with solar panels providing clean and green electricity for metro trains. 66 MW, and generates an average of about 3. 4 million kWh of electricity each year. This can help save the. Elevated metro stations may highly benefit from rooftop solar power generation combined with battery storage, new research from China suggests. Solar-powered metro rail systems provide a sustainable alternative to conventional grid-powered transit by decreasing dependence on fossil fuels, lowering carbon footprints, and. needed from non-renewable sources. Overview of the Solar Power.