Most of Russia is a zone of risky farming. This includes several federal districts: North-Western, Ural, Siberian and Far Eastern. Therefore, the crop production industry in protected soil is very widespread in the country and not only in these regions. The share of domestically produced vegetables, especially greenhouse vegetables, is growing from year to year. For example, the percentage of cucumbers produced in greenhouses exceeded 85 percent. Protected soil enterprises are the most energy-intensive industries, since all technological processes are more related to energy consumption: maintaining a microclimate (heating in the cold season, air cooling in the hot season), lighting, irradiation, watering. The quality and cost of manufactured products largely depends on the share of electricity costs. Therefore, the quality of energy supply is one of the pressing issues affecting the efficiency of the enterprise. (Research purpose) The research purpose is to analyze the impact of the quality of electricity supply on the technological equipment of greenhouses, to compile a list of technological equipment most affected by the quality of electricity supply. (Materials and methods) The article presents an overview analysis of the effect of electric power deviations on the efficiency of technological equipment in greenhouses. (Results and discussion) The averaged dependences of equipment power consumption depends on climatic conditions and daylight duration. (Conclusions) It is necessary to conduct detailed studies in order to develop recommendations to reduce the risks of poor-quality power supply of greenhouse plants. The use of renewable energy sources for alternative and combined energy supply is promising.
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