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Statistical studies have shown that many electric vehicles existing in the market today can cater to most typical daily driving trips. However where such vehicles are sometimes found wanting are the occasional trips beyond the available electric vehicle range, or unexpected trips when the battery is already in a discharged state. These circumstances necessitate either maintaining a second internal combustion engine powered car or use of public transport. An alternative to this is the use of a range extended electric vehicle (REEV). A REEV can operate in two modes, either as an electric vehicle on short journeys or as a series hybrid with the aid of a small auxiliary power unit (APU) when the battery energy is low over longer distances. The addition of an APU eliminates the range anxiety experienced by electric vehicle owners by extending the range possible in a single charge.