An innovative approach of installation of solar PV over the railway coaches was adapted by the railways. The PV panels installed over the coaches are supposed to take away the parasitic load on the engine through the present axle-based alternators for lighting and ventilating the coaches. The proposed article is an attempt to suggest the railways to adopt a simple yet effective technology to enhance the performance of the panels installed over coaches and its buildings. The article also gives a viable solution to harness the heat available over the coach roof in order to maintain the temperature of the coach and hence reducing the heat load on the air-conditioned coaches. A simple serpentine copper coil is proposed to be placed below the PV panels installed over the railway coaches and water is proposed to be circulated in the coil for cooling the panel. The cooling of the panel is expected to enhance the electrical performance of the PV panel. The heat as gained by the water is proposed to be stored in insulated under coach tanks in the form of hot water. This hot water may be best used for potable water generation through assistance to solar stills installed at railway stations by collection at railway stations in a way already adopted by the railways for filling of overhead and underslung tanks. The proposed system is expected to improve solar still performance, electrical performance of solar PV, thermal performance at the base kitchens run by railways and the COP of the air conditioning units in coaches by lowering the heat gain through the roof. An experimental demonstration of the proposed system is discussed in this article.