Future military platforms will to an increasing extent use electric energy, not only to power electric equipment but also for propulsion and for different weapons and protection systems. Increased access to electric energy enables new weapon and protection concepts, as laser and microwave weapons as well as electric armour: It can also be used to improve the performance of tank and artillery guns. Electric energy consumers on combat vehicles can have very differing requirements on electric energy and power, pulse length, etc. Hence there is a need for intermediate storages to buffer energy and for pulse shaping components to adjust power and pulse length. Magnetodynamic storages (flywheels) are particularly interesting since they can store large quantities of energy and supply electric pulses repetitively. To investigate the possibilities to power electric weapons and protection systems on a military platform it is essential to study how the pulsed application interacts with the energy system and which requirements must be imposed upon system stability, available peak power and energy, etc. A flexible simulation model to be used as a tool in such studies has been developed in Matlab/Simulink/SimPowerSystems. This report summarizes the work with building the simulation model of an AECV energy system, briefly describes the model and gives examples of simulation results for some selected scenarios. Finally some suggestions for extension of the simulation model are given.