Abstract: To evaluate the feasibility and economy of tram on board PV (photovoltaic) system accessing 24 V DC bus scheme, taking the world first hydrogen fuel cell hybrid power 100% low floor tram as research object, on board PV power generation system (hereafter OPVGS for short) is designed and the installation position and dimensions of the system on trams are described. The power generation amount of the on board PV system after installing translucent modules within tram lifespan is predicted by standard hours method. The scheme of tram OPVGS accessing 24 V DC bus is introduced in detail. The prototype vehicle with on board PV is developed, the electric system of which is composed of OPVGS, data acquisition system and auxiliary power supply and storage equipment, and the electrical topology diagram of the prototype vehicle with OPVGS is given. An economy analysis model of the tram OPVGS accessing 24 V DC bus scheme is constructed, and economy analysis is carried out based on theoretical calculation and prototype vehicle test. Results show that power generation of copper indium gallium selenium thin film cell laid on the roof of 3 car formation tram is 19.11 kWh/d, and the cost can be recovered in 3 to 4 years. The tram OPVGS proves to have good economic feasibility.