As fuel cell powered passenger car rollout picks up momentum, the need for tests is growing worldwide, and so is the demand for independent testing facilities. The purpose of these tests is to assess fuel cells' electrical performance under the kind of a dynamic load that cars cycle through day in and day out. The Centre for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW) recently achieved a remarkable result with a special kind of endurance test. The institute, which boasts Europe's largest fuel cell and battery testing infrastructure, logged more than 5,600 kilometers equivalent per week using a continuously operating 100-kilowatt fuel cell stack. A set of harmonized, dynamic test cycles measured the fuel cell's nonstop performance in a test bench and also furnished key information about hydrogen consumption.