A comprehensive analysis of global bus procurement records reveals a stark divergence in adoption between battery-electric and hydrogen fuel-cell zero-emission technologies. The procurement register compiled from 388 sourced records across 81 countries documents 13,165 firm orders for battery-electric buses against 65 hydrogen fuel-cell buses, representing approximately a 200-to-1 ratio favoring battery-electric technology.
The distribution of purchasers further underscores battery-electric dominance, with orders coming from 55 different transit agencies, while all hydrogen bus purchases originated from just two sources. The author emphasizes the importance of distinguishing firm orders from tenders, framework agreements and funding announcements, as the former represent actual purchasing decisions rather than promotional announcements. Battery-electric procurement remains visible across diverse geographic regions and climatic conditions, while hydrogen purchases remain concentrated geographically.
The two hydrogen bus procurement cases warrant examination as partial validations of the technology under specific circumstances. Qingyang in China is developing a coordinated municipal hydrogen ecosystem integrating buses, fuel supply and infrastructure as part of broader development initiatives. Krefeld in Germany represents a noteworthy commercial example, having selected hydrogen buses after initial operating experience. However, these cases have not prompted replication despite years of hydrogen demonstration programs, subsidies and manufacturer development efforts.
The procurement evidence suggests that challenges associated with battery-electric fleet conversion—including depot power requirements, utility interconnection timelines and charging system reliability—now represent deployment problems for the technology with the broadest market adoption rather than indicators of an evenly balanced technological competition. The analysis recommends treating battery-electric as the default reference technology for standard urban and suburban bus procurement, while establishing hydrogen as an exception requiring demonstration of specific operational constraints, long-term fuel supply viability and economic advantages sufficient to justify dedicated infrastructure.
Policy priorities should shift accordingly, focusing on grid planning, depot connections, charging reliability, workforce development and financing solutions for battery-electric systems rather than continuing to fund comparative technology demonstrations already resolved by procurement patterns.
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