State-owned electricity producer Eskom has submitted major updates to the cost assumptions included in its latest allowable revenue application but has nevertheless sustained its request for a 20.5% tariff hike for its upcoming 2022/23 financial year. In a presentation delivered on the second day of National Energy Regulator of South Africa (Nersa) public hearings on the application, CFO Calib Cassim said the updates reflected changes that had arisen subsequent to its initial submission, which was made on June 2 last year.