Zweckverband Nahverkehr Westfalen-Lippe (NWL), the regional transport authority for the Westphalia-Lippe area of Germany, has ordered 61 battery-powered trains from Siemens. The operator set to run the fleet is NNW, which serves the region's regional network.

The order places battery-electric multiple units at the centre of one of Germany's regional fleets. Battery trains fill a specific gap in the German network: they run on electrified lines under overhead wire and switch to battery power on non-electrified branches, recharging while running under wire. For an authority such as NWL, whose network combines wired corridors with diesel-only secondary routes, the technology offers a route to emission-free operation without the cost of extending catenary across every branch.

Siemens has positioned its battery platform in this segment of the market for several years, and the NWL contract adds a substantial volume order to its reference list in Germany. The 61-train fleet size indicates a deployment across multiple lines rather than a single pilot route, and it makes NWL one of the larger buyers of battery traction among German transport authorities to date.

The announcement comes as an operator-supplier agreement, and key operational details — delivery dates, vehicle type and configuration, depot and charging infrastructure plans, and the contract value — were not disclosed in the initial statement. Those details will determine the service outcomes: how many non-electrified route-kilometres the fleet can convert from diesel, what capacity each trainset provides, and when passengers on the affected lines will see the new units in service.

The order fits the wider pattern among German Verkehrsverbünde and Zweckverbände, which have been contracting battery, hydrogen and electric multiple units as replacements for ageing diesel fleets under federal and state decarbonisation programmes. NWL's decision to go with battery traction at a fleet scale of 61 units signals confidence that the technology has moved beyond trial operation into mainstream procurement for regional networks with mixed electrification.

Siemens said the trains will be supplied to NNW for operation on the Westphalia regional network. Further specifics on the rollout are expected as the manufacturer and the authority publish delivery schedules and fleet deployment plans.