Siemens Mobility has begun production of three hydrogen-powered Mireo Plus H trains for the Südostbayernbahn network, with passenger service expected to start in late 2026. Commissioned by the State of Bavaria, these state-of-the-art, two-car trains will replace diesel units operating from Mühldorf in Upper Bavaria, offering quieter and emission-free rail transport.
The new trains will run along the non-electrified Mühldorf–Tüßling–Burghausen line, a 32.3-kilometre route, serving eight stations. Deutsche Bahn (DB) will support operations with a dedicated electrolysis plant in Mühldorf, powered entirely by green electricity.
“Hydrogen trains are an important building block for DB on its path to achieving climate neutrality,” said Cornelia Würtz, Managing Director of DB RegioNetz Verkehrs GmbH. “By introducing the Mireo Plus H, we are helping drive the climate-friendly rail transport transition at Südostbayernbahn.”
The trains will offer enhanced comfort and functionality, including space for nine bicycles, low-floor access, and special high-frequency-permeable windows to improve mobile phone reception. Equipped with the European Train Control System (ETCS), they also promise operational safety and efficiency.
Siemens Mobility has also been awarded a service contract for the trains’ hydrogen supply system. The company says the Mireo Plus H platform combines proven regional train design with zero-emission technology, offering a powerful drive system and long operational range.
“We are proud to be delivering Mireo Plus H hydrogen trains to Deutsche Bahn and thus enabling emission-free mobility in our home region,” said Andre Rodenbeck, CEO Rolling Stock at Siemens Mobility. “Our hydrogen trains feature mature technology, high energy efficiency, strong drive power, long operating range, and low noise levels.”
The trains operate using a roof-mounted hydrogen fuel cell system and lithium-ion batteries beneath the car floor. They can reach speeds of up to 140 km/h, with a drive power of 1.7 MW and acceleration of up to 1.1 m/s². A single tank can support travel up to 1,200 kilometres, depending on route conditions and driving style. Refuelling takes approximately 15 minutes.
Hydrogen trains are seen as a cleaner alternative to diesel units, emitting only water vapour and producing no CO₂ or nitrogen oxides during operation. They are particularly suitable for non-electrified routes and are quieter than conventional diesel trains due to their electric drive systems.
The Mireo Plus H’s lightweight aluminium construction, aerodynamic design, and onboard energy management also contribute to lower lifecycle costs and improved sustainability.
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