Daimler this week unveiled the first of its new generation Mercedes-Benz Citaro FuelCELL-Hybrid transit buses. Thirty of these new buses will be going into service in 2010 with the first 10 going to Hamburg Germany where previous-generation fuel cell buses have already been in service for several years. The new buses use the latest iteration of Daimler's fuel cell drive system which consists of a modular stack design. By building the fuel cell stack in modules, it can be scaled for different applications with the same hardware used in the bus and the new series of B-class F-Cell cars. Twenty of the fuel cell B-Classes will also be going to Hamburg for use by the transit company.
The combination of the new stack design and a hybrid configuration using lithium ion batteries allows the fuel cells to operate at a more constant output with the batteries taking care of the transient acceleration needs. The result is that fuel consumption is cut in half compared to the older buses and the new buses have a range of 155 miles. The bus deployment is part of the Clean Energy Partnership which will see four new public hydrogen filling stations constructed in Hamburg.