Daimler Buses presses ahead with hydrogen solutions for commercial transport. By Stewart Burnett
Daimler Buses has unveiled a new hydrogen-only ‘H2 mode’ for its eCitaro G e-buses, allowing them to operate exclusively on hydrogen fuel cells without requiring external battery charging. The development aims to give operators a back-up plan if chargers are not operational while also boosting range.
The eCitaro G buses, equipped with four NMC3 battery packs totaling 392 kWh and six hydrogen tanks with a capacity of 30 kg, use the hydrogen fuel cell to generate electricity directly for the electric motors. The fuel cell operates optimally within a range of 20 to 40 kW, supported by regenerative braking that charges the batteries during operation.
So far, deployment is limited. Ten buses featuring this technology have been delivered to Stuttgart’s public transport agency, SSB. SSB aims to transition itself to an entirely emission-free bus fleet by no later than 2035. With a capacity of up to 124 passengers, the buses are designed for urban use, offering advanced safety features like Sideguard Assist, Traffic Sign Assist, and Attention Assist.
The hydrogen-only mode eliminates reliance on stationary charging infrastructure, making the buses suitable for routes with frequent stops or steep inclines. The buses also feature spacious interiors, USB charging ports, and wheelchair-accessible areas, enhancing passenger comfort and accessibility.