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This paper focused on the impact of lifestyle changes in response to the novel coronavirus infection (COVID-19) on the electricity demand of 1339 detached houses from October 2020 to March 2021. Analyzing with the lifestyle questionnaire survey, twelve months after the first state of emergency for COVID-19 at April 2020, "working from home" was the only factor that increased household power consumption for 11% and the other factors were gone. Space heating power consumption in this period did not increase significantly. Lifestyle changes have affected household timely electricity demand and increased self-consumption of renewable energy of photovoltaic power generation systems.

This paper focused on the impact of lifestyle changes in response to the novel coronavirus infection (COVID-19) on the electricity demand of 1398 detached houses during Apr. 2020-Sep. 2020. The rate of increase in power consumption excluding space cooling was the largest in April with an average of 19% for all households. The reason of this increase was analyzed with questionnaire survey. 87 households with room air conditioners consumed more space cooling power in August than usual at an increase of 23%. Power consumption of the centralized air conditioner was less affected than that of the room air conditioner.