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Cenex, the UK's centre of excellence for low carbon and fuel cell technologies, is currently deploying electric passenger cars and vans throughout the UK in a series of Government funded low carbon vehicle trials. This study, produced in partnership with Millbrook Proving Ground, investigates comments and concludes on energy consumption in electric vehicles with varying driving styles and driving duties. At Millbrook, the electric vehicle (EV) track cycle is designed to represent real world driving duties over city, rural, hill and high speed circuits. It is shown that the drive efficiencies over the EV track cycle vary significantly by driver and the largest variations are noted on tracks with the highest opportunities for regenerative energy capture. To further study the regenerative energy, a model is developed and the percentage of potential vehicle energy recovered during deceleration is quantified.

Cenex, the UK's first Centre of Excellence for low carbon and fuel cell technologies, reports the results from a six month fleet electric vehicle trial. The study focuses on, and refers to vehicle performance in five private sector fleets. On board telemetry and data logging record key parameters which allow monitoring and reporting of usage patterns and energy consumption. The paper demonstrates the effect of duty cycle of candidate case studied organizations and the low ambient temperatures observed during the trial on range. The study quantifies the utilization patterns of the EVs, journey statistics, range, CO2 emissions and explores the links between range, auxiliary power use and ambient temperature. A questionnaire issued to EV users during the trial quantifies perception of performance and fleet integration aspects as well as looking at the importance of different aspects of EV purchasing decisions.