Chicago commuter rail operator Metra has unveiled its first battery-electric passenger train, introducing technology that could help U.S. commuter railroads reduce diesel dependence without installing overhead electrical infrastructure along entire routes.
The Stadler-built FLIRT battery-electric multiple-unit train was presented during APTA TRANSform & EXPO in Chicago, with a public unveiling at LaSalle Street Station on Oct. 14. Metra plans to deploy the trains on the Beverly Branch of its Rock Island Line, where they will replace conventional diesel-powered service.
The agency has ordered eight two-car trainsets, with passenger operations targeted for 2028. The vehicles are designed to operate using onboard batteries, allowing them to serve routes that lack overhead catenary or third-rail power.
For commuter rail operators, the significance extends beyond the introduction of a new propulsion technology. Battery-electric trains could provide another fleet option for shorter routes where full corridor electrification presents substantial capital, construction, or operational challenges.
A new fleet approach for Metra's Beverly Branch
Eric Sandy
Unlike conventional diesel locomotives hauling passenger coaches, the FLIRT battery train is a self-propelled electric multiple unit. Propulsion equipment is distributed throughout the trainset, with batteries supplying power to electric traction motors.
That arrangement eliminates the need for a diesel locomotive during battery-powered operation and allows the train to use regenerative braking to recover some energy during deceleration.
The trains are expected to provide modern passenger amenities, including accessible boarding arrangements and updated onboard systems. Introducing them will also require Metra to prepare charging infrastructure, maintenance procedures, and operating practices for a new propulsion platform.
The agency's order represents a relatively contained initial deployment, giving Metra an opportunity to evaluate the technology before considering broader applications across its network.
Why the Beverly Branch makes sense for battery trains
The planned deployment covers approximately 16 miles between LaSalle Street Station and Blue Island. Metra has identified the Beverly Branch as an initial application for battery-electric technology because its route length and service pattern are compatible with the trains' expected operating range.
According to reporting from WBEZ, Metra expects a range of approximately 70 miles per charge. The trains will operate at speeds up to 79 mph, consistent with the railroad's existing maximum operating speed.
The Beverly Branch is also part of Metra's effort to explore more frequent, all-day regional rail service. Smaller, self-propelled trainsets could give the agency additional flexibility to operate service outside traditional peak commuting periods, although the eventual schedule will depend on operating plans, infrastructure, and fleet availability.
That distinction is important for commuter railroads evaluating battery technology. A train's advertised range is only one consideration. Agencies must also determine whether charging can be accommodated within existing schedules, how battery performance changes with weather and passenger loads, and whether sufficient reserve capacity is available to handle service disruptions.
For Metra, the Beverly Branch will provide an opportunity to evaluate those questions in regular passenger operations.
Charging infrastructure becomes part of the operating plan
Stadler's battery-electric FLIRT uses onboard lithium-ion batteries to power electric traction motors. The manufacturer says the trains can recharge through dedicated charging equipment, existing 480-volt electrical connections at yards and terminals, and regenerative braking.
Unlike conventional electric trains, battery-powered equipment does not require continuous overhead catenary or third-rail infrastructure along its route. Instead, agencies can concentrate charging investments at selected locations.
That can substantially change the scope of an electrification project, but it also introduces new operating requirements.
Charging equipment must be sized to support the fleet's energy needs and scheduled turnaround times. Electrical supply, charging reliability, battery health, and maintenance procedures become essential elements of service planning.
For routes with relatively short distances and predictable schedules, those requirements may be manageable without the extensive civil and electrical work associated with full corridor electrification.
Longer routes, high-frequency operations, or corridors with limited charging opportunities present different challenges. Battery trains may be suitable for some applications while conventional electrification remains the stronger option for others.
An eight-trainset investment
Metra's initial order includes eight battery-electric FLIRT trainsets, with an option to purchase eight additional units.
The railroad is spending approximately $234 million on the initial fleet, according to WBEZ. The vehicles are expected to enter service beginning in 2028, following further testing and certification.
The train displayed at LaSalle Street Station on Oct. 14 and 15 included two passenger cars connected by a dedicated battery equipment car. The final operating configuration is expected to include additional passenger cars.
Metra officials said the display train still requires battery installation and will undergo extensive testing at the Transportation Technology Center in Pueblo, Colorado, before entering passenger service.
The testing process will be an important step in establishing how the equipment performs under U.S. operating and safety requirements. It will also give Metra time to prepare maintenance personnel, train crews, and supporting infrastructure for a propulsion technology that differs substantially from its conventional diesel fleet.
A technology already operating overseas
Although Metra's FLIRT represents a first for the U.S. market, battery-electric regional trains are already operating in Europe.
Stadler introduced its FLIRT Akku trains into passenger service in Germany in 2023, replacing diesel equipment on partially electrified regional networks.
Those deployments demonstrate the technology's potential, but Metra's experience will be particularly relevant to North American commuter railroads, where routes, operating practices, infrastructure standards, and fleet maintenance requirements can differ significantly.
The U.S. introduction also comes as commuter rail agencies reassess the traditional peak-period operating model. More frequent service throughout the day may require different fleet sizes, acceleration characteristics, and operating economics than locomotive-hauled trains designed primarily for large rush-hour passenger volumes.
Battery-electric multiple units could offer one way to address those changing requirements on suitable corridors.
What Metra's deployment could demonstrate
For other commuter rail agencies, the most useful lessons will emerge after the trains enter service.
Metra's Beverly Branch deployment should provide evidence about actual battery range, charging performance, maintenance requirements, vehicle availability, and operating costs under regular service conditions.
It will also help establish whether battery-electric trains can support more frequent service without the infrastructure investments required for conventional electrification.
The initial unveiling at APTA TRANSform & EXPO and subsequent public display at LaSalle Street Station marked an important milestone for the technology's introduction to North America. The more consequential test will come when Metra begins operating the trains in daily service.
For agencies considering alternatives to diesel propulsion, that experience could help clarify where battery-electric rail is technically and economically practical — and where other electrification strategies remain necessary.
