The contract agreement was signed between Bhel and Indian Railways Organisation for Alternate Fuels (IROAF).
It envisages design, supply, installation, testing and commissioning of grid connected roof top solar photo voltaic power plant with all electrical and associated equipment including civil works, Bhel said.
It also includes operations and maintenance for 5 years.
"Bhel has bagged one more order of 2 MW roof top SPV systems at Diesel Locomotive Modernisation Works (DMW), Patiala," the company said in a statement.