On 28 March 2025, the AER received a revenue adjustment proposal from Transgrid for the System Integrity Protection Scheme Service (SIPS) battery service component of the Waratah Super Battery project.

Transgrid proposed adjustments to the schedule of quarterly payments that are to be paid to it as the Network Operator for the project and, in turn, to the SIPS battery service provider (Akaysha Energy).

The proposed adjustment relates to the triggering of the adjustment mechanism for a ‘Delay in achieving Commercial Operation’. 

Consistent with our contestable guideline, we will endeavour to make our revenue adjustment decision within 42 business days of receipt of the revenue adjustment proposal.

As the details of the adjustment mechanism and the service payment schedule are confidential in our revenue determination, we are not able to publish the proposed adjustment amount. To provide transparency, we will publish updated aggregated information on the total and annual amounts to be paid to Transgrid for contestably procured components of the Waratah Super Battery project, once we have made decisions on the annual adjustment proposals related to these components.