Eskom CEO Jacob Maroga has resigned, chairperson Bobby Godsell told staff on Thursday.

"Mr Maroga tendered his resignation.... which we have accepted. We wish him well in his future endeavours," Godsell told Eskom staff at a meeting in Megawatt Park in Johannesburg.

Eskom board member Mpho Makwana said: "It is a difficult time for Eskom. All that we can do is put our heads together... Mr Maroga needs time to heal, we have to allow that process to go on."

Godsell was scheduled to address the media at 1pm, but the briefing was cancelled at the last minute.

Earlier on Thursday, Public Enterprises Minister Barbara Hogan denied reports that President Jacob Zuma interfered in the controversy between Maroga and the board of directors.

"It has come to my attention that there is an apparent breakdown in relations between the Board of Directors of Eskom and the CEO," she said in a statement.

"As Eskom's shareholder, I am committed to actively engaging with all relevant parties to ensure and secure the best possible solution and outcome for Eskom and the public.

"As shareholder, government has indicated to all relevant parties that this matter should be resolved expeditiously, with due regard to every single person's dignity and rights.

"I would like to add that at no point did the President of the Republic, Mr Jacob Zuma, interfere in any way whatsoever with this process."