The Federal Court has dismissed an appeal by South Australia's power distributor, SA Power Networks (SAPN), to recover an additional $250 million in revenue.
SA Power Networks appealed the Australian Energy Regulator's decision to deny the network's application to receive $4.53 billion over the 2015 to 2020 period.
Instead, the government body said they would provide SAPN with $3.84 billion over five years.
Australian Energy Regulator chair Paula Conboy said the court's decision was a win for consumers.
"It's important in a time when energy affordability is a serious concern," Ms Conboy said.
"It's more important than ever that consumers have the confidence that the Australian Energy regulator is carefully examining all aspects of network costs."
Energy Minister Tom Koutsantonis urged the network to accept the court's latest decision and not appeal the matter to the High Court.
"What SAPN was seeking to do was to charge hundreds of millions of dollars more for the use of poles and wires, which would have been added straight to the bill of every South Australian," Mr Koutsantonis said.
"We have now had determinations from the Australian Energy Regulator, the Australian Competition Tribunal and the Federal Court, which have all found that the attempts by SA Power Networks to charge South Australians more are unjustified.
"It's time they accept those decisions and I urge them not to appeal today's ruling to the High Court."
