JOHANNESBURG (Reuters) – South Africa added 1,286 megawatts (MW) to its national grid on Thursday when two generating units were brought back online following an extensive “overhaul”, power utility Eskom said.

Eskom said electricity supplies would continue to be tight as it carried out other plant maintenance.

South Africa, the continent’s most developed economy, suffered almost daily power outages earlier this year as ageing power plants struggled to meet demand. South Africa’s national generating capacity is around 42,000 MW.