This paper presents a control system design for a battery electric tower car (BETC) equipped with a dc traction motor to replace the existing power pack of the diesel-electric tower car of Indian Railways to reduce CO2 emissions and enhance the performance and efficiency of the system. Also, a systematic method to estimate the size of the battery is presented. This configuration optimizes energy utilization by leveraging the fast power delivery of the batteries, ensuring a continuous and reliable power supply under various operating conditions. The system incorporates an efficient controlled algorithm for precise speed and dc-link voltage regulation with dc-dc buck-boost and bidirectional converters, respectively, resulting in smooth acceleration and enhanced system efficiency. The control system and architecture for the BETC are verified through the MATLAB/Simulink environment for a 10 kW system.