Bidders will need to pay a non-refundable R200 000 feee when they submit proposals to build, operate and maintain the new coal plants, according to a tender notice posted in national newspapers.
The government will give the winners a power purchase agreement with struggling Eskom.
South Africa has suffered its worst power shortages in six years this month due to old power plants and emergency maintenance.
Sign deals
Eskom is facing a R233bn funding shortfall over the next four years, forcing the government to consider selling state assets to bail out the utility.
The government announced on Thursday that it would launch a private sector-led coal-fired power plant programme by January 2015, which should add 2 500 megawatts of generation capacity to the grid.
It also said it would increase diesel and gas imports to fuel under-supplied plants and sign deals next week for renewable energy projects, which would add an additional 1 000MW.