However, as a result of increased electricity demand in the evening and some power stations’ units being on maintenance, the power system was expected to be constrained during the evening peak period (5pm to 9pm).

“As we are currently experiencing cold weather conditions across the country, we urge electricity users to consider energy efficient ways of keeping warm,” Eskom said in a statement.

In winter the electricity demand peaked in the morning and evening as more electricity was used during these times.

“We appeal to all our customers to continue to reduce their electricity usage throughout the day but to be aware of the need to save more during the peak periods from [6am to 10am and 5pm to 9pm],” it said.

Commercial customers, particularly shopping centres and office blocks, could also make a big difference by switching off non-essential lights and not leaving office equipment, such as photocopiers and computers, in standby mode after hours.