The power system was stable on Monday morning, power utility Eskom said.

"If anything unexpected happens, we may need to go into load shedding, but as the situation stands, we are fine at this stage," its media desk said.

Last Monday, Eskom said unit six at its newly-built Medupi power station in Limpopo produced power for the first time.

"The electricity flowing into the grid marks a new beginning," Eskom CE Tshediso Matona said in a statement.

"Within the next three months, South Africa will see Medupi unit six's full potential of 794 MW being fed into the South African national grid."

This was the first of Medupi power station's six units to be synchronised. Synchronisation, or first power, involves the generator being connected to the grid so its power is aligned with all the other generators to deliver electricity.