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Poznań fuel cell bus failure attributed to contaminated fuel

Almost every bus in MPK Poznań’s hydrogen fleet experienced near-simultaneous failures due to pollutants in the fuel. By Stewart Burnett

Local Polish transportation company MPK Poznań has offered clarity on its 4 March 2025 withdrawal of all 25 hydrogen-powered buses from service following a rapid succession of malfunctions in almost all vehicles. After conducting extensive testing by hydrogen bus maker Solaris, the cause of the failures has been identified as poor-quality hydrogen from an external supplier.

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