Method and system for an optimized utilization of energy resources of an electrical system

The present invention relates to a method for the optimized utilization of available energy resources/sources (3) of an electrical system for a vehicle, in particular of a generator system, which includes the following steps: - determining performance parameters L Ist (e.g. current I, voltage U, temperature T, power P D (P vedust ) P E (P wirk ), efficiency, etc.) of a preferred energy resource (3) of the electrical system; - entering performance parameters L Ist (current I, voltage U, temperature T, altitude of the vehicle, etc.) of the energy resource (3) into a thermal model (7); - comparing at least one performance parameter L Ist of the energy resource (3) with a specified performance limit parameter L Soll at a specified threshold level of the energy resource (3); - determining a value for an energy reservoir E Rest of a preferred energy resource (3) - using the one or more identified performance parameters L Ist at the threshold level of the energy resource (3) - to maintain an operational state of the vehicle or maintain the current utilization by means of additional energy resources (3); - and to calculate a remaining time T Max depending on the energy reservoir E Rest of a preferred energy resource (3) and using the one or more identified performance parameters List to maintain an operational state of the vehicle.