LOCOMOTIVE RETROFIT
Nanjing Metro Hybrid Electric Shunter
Introduction
Alta led the development of the JW01 hybrid shunter in collaboration with CRRC, who supplied the chassis and cab. The locomotive combines a diesel engine with an LTO battery-electric system, providing efficient, low-emission operation across Nanjing Metro’s depots and maintenance facilities. Following the success of the prototype trials, Nanjing Metro has placed subsequent orders, validating the design’s performance and commercial potential.
Alta's Scope of Work
Alta led the development, supply and integration of the following major systems and components:
Technology Snapshot
The JW01 hybrid shunter combines a 739 V, 200 kWh LTO battery system with a 64 kW diesel engine, delivering consistent traction performance and flexible operation across metro depots and maintenance lines.
Outcome & Significance
The JW01 project demonstrates Alta’s capability to lead end-to-end development of hybrid locomotives for urban rail applications. By combining high-cycle LTO storage with proven traction technology, Alta enabled Nanjing Metro to achieve greater operational flexibility, reduced fuel consumption, and lower emissions, all without compromising reliability or performance. The success of the JW01 sets a precedent for future hybrid maintenance locomotives within metro systems across China.