The increasing number of Distributed Energy Resources, energy storages and sector-coupling devices requires mechanisms to manage the local energy utilization. Hereby the dependency on fossil resources can be highly reduced. For this, it is essential that energy resources of whole industrial facilities are analysed and adapted. Therefore, the goal for the presented investigation of Industrial Facilities is, to use local available renewables in an optimal way, to reduce the external energy consumption and increase the self-consumption. Physical models, multiple polynomial regression and time series analysis are utilized. The special feature of this investigation is the holistic approach that includes analyses of the energy demand and the local energy generation, profiles of the entire system and parameter fitting. Moreover, the developed methods are independent of the observed local energy system and can be applied in a general way.