The present invention relates to energy management method, a large variation in this way the current consumption of the vehicle-mounted electric equipment, in particular, to mitigate the cheating current variation caused by excessive making current of an electric actuator or a solenoid valve, more evenly over time a method of dispersing about. Above, the predictive operation of the energy management method, both available energy and energy requirement in the subsequent period, the activation request and, if consumers Following the declaration of priority and start request is started at the latest become not depending on the actual allowable time is realized by determining, based on the consumption device selected to start. Allowable time is updated continuously.