"[The company] and its product range … was never awarded an R800-million contract by City Power," it said in a statement on Wednesday.
The National Union of Metalworkers of South Africa (Numsa) brought an application in the South Gauteng High Court on Tuesday for Jo'burg City Power to disclose details of the tender. The case was postponed until Tuesday.
Tasol said on Wednesday it was not a part of the court process in any way.
Numsa has claimed that City Power awarded the company the tender to supply and install low pressure solar-powered geysers.
It wanted to know on whose instructions the tender was awarded as it was concerned about the jobs in the local solar geyser manufacturing sector.
Tasol also denied a claim by Numsa spokesperson Castro Ngobese that it was importing geyser units from China, when these could have been locally manufactured to support employment in the metal industry.
The company said its locally-produced product range was manufactured at a production plant in Alberton.
"All our locally-produced products are certified by the South African Bureau of Standards," it said.
On Tuesday, Ngobese said the government's programme of rolling-out a-million solar-powered geyser units by 2014 was ideal for the local sector, but was being hindered by the large scale importation of the product.
"Since the announcement of the roll-out programme, this sector is bleeding and is under distress, as on a daily basis jobs are being lost amidst the triple crisis of poverty, unemployment and inequality."
At the time, City Power spokesperson Sol Masolo said the utility was leaving the matter in the hands of the court. – Sapa