On 5 June 2020, we released our final decision on SA Power Networks electricity distribution determination for the 2020–25 regulatory control period. Our final decision is set out in the Overview and accompanying attachments. As a number of issues were settled at the draft decision stage or required only minor updates, we have not prepared all attachments. In these circumstances our draft decision reasons form part of this final decision.

On 25 March 2024 we published our determination to revoke and substitute our final decision on SA Power Network’s electricity distribution determination for the 2020–25 regulatory control period. A material error was identified that impacted our operating and capital expenditure, revenue, Demand Management Innovation Allowance Mechanism and Service Target Performance Incentive Scheme incentive rate final decisions. The revocation and substitution determination can be found here.

Reports commissioned by the AER in preparing our final decision for SA Power Networks

AER final decision models for SA Power Networks

On 26 November 2021, the AER revoked and substituted the 2020–25 determination for SA Power Networks to correct an error in the control mechanisms attachment to facilitate an appropriate transition from the previous version of the service target performance incentive scheme (STPIS 1.2) to its latest version (STPIS 2.0).

All other aspects of the determination remain as per the AER’s final determination which was originally made on 5 June 2020.

On 25 March 2024, the AER published its revocation and substitution determination for the for the 2020–25 regulatory control period. This corrected a material error relating to cable and conductor minor repairs that impacted our operating and capital expenditure decisions. This had flow on impacts to revenues, and the Demand Management Innovation Allowance Mechanism allowance and Service Target Performance Incentive Scheme incentive rates. 

All other aspects of the AER’s final determination remain as were made on 5 June 2020.

Our revocation and substitution determination, associated letter to SA Power Networks on this matter and the revised PTRM are below. The revised PTRM includes revenues approved in our Emergency standard cost pass through decision and annual updates for return on debt up to and including 2023–24 which can be found here.