More than 169,000 South Australian households will this week receive instructions on how to slash their electricity bills by 18 per cent.
South Australian Council of Social Service (SACOSS) chief executive officer Ross Womersley says the state government's Concessions Energy Discount Offer will help address cost-of-living pressures for low-income earners.
"At the lowest end, you might expect savings in the region of $100 a year. At the upper end, the government has calculated that savings are probably closer to $531," Mr Womersley said on Monday.
The special deal will also offer people flexible payment options and comes with no late payment fees, no processing fees and no exit fees.
It is available to any household receiving an existing state government energy concession which is already worth about $217 a year.
"This is real cost-of-living relief to those South Australians who need it most," Premier Jay Weatherill said.