The issue of deterioration in the quality of electrical energy as a result of its excess consumption is considered. Such consumption is due to insufficient supply of thermal energy. The concept of general energy consumption by business entities is proposed. Within the framework of the concept, all types of energy consumed by the consumer are taken into account and a correlation dependence of the replacement of one type of energy with another is derived. Thus, a mathematical model of the interconnected energy pool consumed by the consumer is created. Within the framework of such a model, electrical energy, as the most versatile, can act as a substitute or supplement for other types of energy in the consumption pool. It is proposed to measure the types of energy by its market value, adjusted to the needs and demand of the consumer. Moreover, the dependence of the present value should be adjusted in accordance with the energy level of the surrounding space (seasonal temperatures), the need for activity, and so on. The adjustment is proposed to be carried out by the corresponding statistical coefficients. The energy connectivity model is proposed to be built in volume as a combination of the ends of vectors proportional to the present value of the corresponding type of energy. The slope of the vector must correspond to the degree of substitution of one type of energy by another. Thus, the dependence of the mutual influence of various types of energy consumed by the consumer is obtained. The largest amount of energy in our climate is thermal energy. Therefore, the lack of thermal energy or its low quality must be compensated by other types of consumer energy consumption. Since electrical energy is the most versatile, it is used primarily to equalize the body's energy consumption. Such consumption leads to a deterioration in the quality of electrical energy. The concept of the mutual influence of energies is being developed, in which the concept of "energy consumption body" is introduced to enable visual representation and calculation of the influence of the interconnectedness of energies and the creation of a methodology that allows improving the quality of electrical energy by predicting overconsumption for the introduction of timely measures.