At first glance, they look like ordinary trains. But there’s no diesel rumble. No overhead wires. No fumes. Just the gentle sound of wheels on tracks… and a puff of steam. This is the future of rail – clean, quiet, and hydrogen-powered. And it all starts with the technology inside.
How does a hydrogen train work?
It’s an electric train – but instead of pulling electricity from overhead lines, it produces its own power on board, with zero emissions. The process is simple but revolutionary:
- Hydrogen refueling – the train is filled with compressed hydrogen (350–700 bar), typically stored on the roof.
- Electrochemical reaction – hydrogen (H₂) from the tanks meets oxygen (O₂) from the air in a fuel cell.
- The result:
- Electricity – powers the train’s motors and systems
- Heat – can be recovered for onboard heating
- Water – the only emission
- Buffer battery – stores excess energy, supports acceleration and braking (regenerative).
- Electric traction motor – drives the wheels, just like in any electric train.
Why hydrogen instead of electrification?
Because over 40% of Europe’s railway network is still non-electrified. And electrification is costly – around €100,000–€400,000 per kilometer. Hydrogen solves that challenge:
- No catenary – lower infrastructure costs
- No emissions – only water vapor
- No noise – better comfort
- Range: up to 1200 km per tank
- Refueling time: 10–20 minutes
- Local hydrogen production possible (e.g. from renewables or biogas)
Where are hydrogen trains already running?
| Country | Lines / Projects | Manufacturer / Model | Production Since | In Operation Since |
|---|---|---|---|---|
| Germany | Lower Saxony, Hesse, Baden-Württemberg | Alstom Coradia iLint | 2018 | 2018 (commercial) |
| Italy | Lombardy, Tuscany | Alstom + FNM | 2022 | 2024 (testing) |
| Austria | Styria test route | Alstom iLint | 2018 | 2020 (testing) |
| France | 12 regions with orders placed | Alstom | 2020 | 2023 (pilot ops) |
| Netherlands | Groningen–Leeuwarden | Stadler / Alstom | 2018–2020 | 2020 (testing) |
| Czechia | 6 units ordered for 2026 | Alstom iLint | 2018 | 2026 (planned) |
| UK | HydroFLEX project (Class 319 conversion) | Porterbrook + Hitachi | 2019 | 2021 (testing) |
| Canada | Alberta, Quebec, Vancouver Island | Alstom, CP Rail | 2023 | 2025 (planned) |
| USA | California, Chicago (Midwest corridor) | Stadler FLIRT H2 | 2022 | 2024 (first deployments) |
| Japan | JR East Hybari prototype | Hitachi, Toshiba | 2021 | 2022 (pilot) |
| South Korea | National H2 Train program (KORAIL) | Hyundai Rotem | 2022 | 2026 (planned) |
| Poland | Pomorskie, Podlaskie, Wielkopolskie (planned) | PESA Bydgoszcz | 2023 (prototype) | 2026 (target launch) |
What’s happening in Poland?
- PESA has developed its first hydrogen-powered locomotive (SM42-6Dn), with a range of ~500 km.
- Regional deployments planned from 2026 onward.
- Key partners: PESA, Orlen (hydrogen supply), PKP Group, Grupa Azoty.
- First railway hydrogen refueling stations expected by 2025.
Is this the future of rail?
Hydrogen won’t replace every train type, but on regional, low-traffic, and non-electrified lines, it’s a game changer. By 2030, hydrogen trains may make up 5–10% of regional rolling stock in Europe – or more in developing markets.
Sources:
IEA Global Hydrogen Review 2024,
Hydrogen Europe,
Alstom,
PESA,
PKP Intercity,
Stadler Rail, Railway Gazette,
European Railway Agency
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