Four major railway stations in Southern Railway, including Chennai Central and Egmore, are set to glow with green power by the end of 2016.This initiative is part of the Indian Railways Solar Mission to reduce dependence on fossil fuels. Out of the target of 50 MW, 4 MW has been allotted to Southern Railway.Tenders will soon be awarded for the installation of rooftop solar power plants at Chennai Central, Chennai Egmore, Moore Market Complex, Tiruchi and Salem railway stations and buildings at an estimated cost of Rs. 32 crore, railway sources said on Wednesday.The solar plants would be installed under the Public Private Partnership (PPP) model from investment by developers.The railways would enter into a 25-year fixed tariff Power Purchase Agreement (PPA) for complete consumption of thepower generated. In case, there is a sharp drop in the price of power when compared to the procurement through other sources, the railways would buy back the solar plant.According to a senior railway official, the zone had a potential for solar energy almost all through the year. The power generated would be sufficient to meet electricity requirements at railway stations and buildings.