Residents in outback South Australian areas will have to pay 18 per cent more for their electricity from next month.
The Energy Department says growing costs of supplying electricity to remote areas forced them to increase prices.
Lyall Oldfield from the general store in Marree says his electricity bill is already about $30,000 a year.
He says it is another big blow to the cost of living in remote areas.
"What do you do?" he said.
"If you went down to your corner deli in Adelaide or in one of the smaller towns around and said, 'what would you do if you got hit with a $3,000 power bill every month, not three months?' Ask them what would happen. They would simply close."
Mr Oldfield says bigger electricity bills could force him to move to solar power.