The National Union of Metalworkers of South Africa (NUMSA) does not agree with the recent Eskom tariff hike granted by NERSA earlier this month.

"We reject any tariff increase for Eskom," the association said in a statement.

"This [response] is what we submitted to NERSA when we participated in the hearings last month. This was because we knew that any increase, no matter how small, would be disastrous for the working class and the poor who are already unable to afford electricity at its current rate.

"This will deepen the crisis for industries, particularly small to medium businesses by making electricity costlier, and we are likely to see retrenchments as a result of this decision."

Read the full NUMSA statement here.