"While we have maintained our operations and supply chains so far by using emergency power generators, this has been at an unsustainable financial cost," the council said in the letter, which was sent to local media.
"It is crippling our businesses, and will in the end mean much higher prices for consumers, who are already under severe financial strain." Last year, Ramaphosa promised to expand generation, slash red tape and buy surplus electricity from private producers.
He is expected to address the power crisis in his state of
the nation address on Thursday.
The council, whose members include the country's biggest
supermarket group and food producer Shoprite and Tiger
Brands , said if the crisis continues, businesses will
not be able to guarantee stable supplies of food, medicines and
other essential goods.
Shoprite has said its additional spend on diesel to operate
generators amounted to 560 million rand ($32 million) in the six
months to Jan.1.
Supermarket group Pick n Pay spent 346 million rand
in the 10 months to Dec. 25 to run generators, and is currently
spending about 60 million rand per month.
($1 = 17.5103 rand)
(Reporting by Nqobile Dludla; Editing by Olivia
Kumwenda-Mtambo, Kirsten Donovan)