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A recent study by the Indian Institute of Science (IISc) has suggested that Bengaluru's upcoming Blue Line Metro could run completely on solar energy. However, Bangalore Metro Rail Corporation Limited (BMRCL) officials said that making the entire metro system operate only on solar power would require major policy decisions and infrastructure changes.
IISc Findings on Bengaluru Metro
The IISc study found that the 55-km Blue Line, which connects Central Silk Board to Kempegowda International Airport, can generate enough solar power using spaces already owned by BMRCL. Solar panels could be installed on station rooftops, depots, viaducts, and canopies. Researchers estimated that around 83.3 MWp of solar capacity could meet the line's annual electricity demand. The study also said this could help BMRCL save a large amount of money on power bills every year while reducing carbon emissions.
BMRCL's Take on the Idea of Solar Energy
However, BMRCL officials explained that the proposal is not easy to implement immediately. They said the current Detailed Project Report (DPR) for the Blue Line was not designed around full solar traction. Since metro systems need continuous and reliable electricity, solar power alone may not always be enough, especially during cloudy weather or at night. This means battery storage systems, backup power arrangements, and changes in grid connectivity would be necessary.
Requirements of New Government Policies for the Implementation
Officials also pointed out that integrating solar energy directly into metro operations would require new government policies, approvals, and technical modifications. Existing metro infrastructure was designed mainly for conventional electricity supply, so large-scale upgrades would be needed. Despite these challenges, BMRCL welcomed the IISc findings and said the study offers useful ideas for making Bengaluru Metro more environmentally friendly in the future.