On 14 December 2022, we published a determination setting out amounts to be paid to Transgrid for the SIPS battery service component of the Waratah Super Battery project. A Network Operator is required to be paid by the Scheme Financial Vehicle in accordance with the schedule of payments contained in our revenue determination.

Under the Electricity Infrastructure Investment (EII) Regulations:

The AER had 42 business days to make a determination from the date we received Transgrid’s revenue proposal on 17 October 2022.

• The Regulations require us to publish our determination, subject to an assessment of confidentiality claims. Our determination includes commercially sensitive information that has been redacted for publication. To provide transparency, we will publish aggregated information on the amounts to be paid to Transgrid in 2023, once we have made a determination for another component of the Waratah Super Battery project relating to paired generation services.

The AER is able to rely on and adopt the outcomes of a competitive assessment process in our determination, if we are satisfied that the process was genuine and appropriate.

• We monitored and reviewed the competitive process that EnergyCo undertook to select Akaysha Energy as the battery service provider and are satisfied that the process was genuine and appropriate. On this basis, and given that the revenue proposal from Transgrid reflected the outcomes of EnergyCo’s competitive process, we have confirmed the amounts proposed by Transgrid in our determination. The details of our assessment are set out in our determination.