Terna: in 7 months of daylight saving time electricity consumption drops by 554 million kwh
Sunday 28 October, the hands of the clock move back one hour; at 03.00am winter time returns
2018 has seen savings of more than €110 million for the electricity system and a reduction in atmospheric CO2 emissions of 290,000 tonnes
Since 2004, €1.5 billion and more than 9 billion kWh of electricity saved
After seven months of daylight saving time, winter time will return on Sunday, 28 October: at 03.00am, the hands of the clock move back one hour. Daylight saving time will return on 31 March 2019.
According to preliminary estimates from Terna, the company that manages the Italian national electricity grid, from 25 March 2018, thanks to the extra hour of daylight, which means less need for artificial light, Italy saved an overall total of 554 million kilowatt hours (equivalent to the annual electricity consumption of around 205,000 families), corresponding to a 290,000-tonne reduction in atmospheric CO2 emissions.
Considering that, in this period, 1 kWh costs the typical domestic user an average of 20 eurocents before tax, the economic savings resulting from daylight saving time for 2018 is around €111 million.
As usual, the months of April and October saw the highest electricity savings. This is due to the fact that these two months have “shorter” days in terms of natural light, compared to other months in the period. Moving the clock ahead one hour postpones the use of artificial light while people are still working. Therefore, during the summer months, such as July and August, since the days are already longer compared to April, the delay in turning on the lights occurs in the evening when most work activities have ended, leading to less significant electricity savings.
According to Terna's data, between 2004 and 2018, the drop in Italy’s electricity consumption due to daylight saving time has totalled around 9.1 billion kWh (equivalent to the energy requirements of a region like Sardinia) and has led to economic savings for citizens of around €1.5 billion.
The “load curve”, representing the real-time trend in Italy’s electricity consumption, is available on Terna’s homepage www.terna.it.