The AlternativeVehicles Library (AV) allows calculating the energy demand and optimizing the energy management for conventional and alternative vehicle concepts. The components provided focus on the simula-tion of alternative power trains. Therefore models of energy storages and energy converters such as electric drives and fuel cells are included. The library was developed within the European research project Eurosyslib. The current version includes contributions of the DLR Institute of Robotics and Mechatronics and is distributed by the Bausch-Gall GmbH. Within this paper architecture and components of the AlternativeVehicles library are described. Exemplarily fuel consumptions of a conventional vehicle and a parallel hybrid vehicle are compared.