On 3 October 2025, Transgrid submitted an application seeking an AER determination on whether the expenditure for proposed system security network support (SSNS) payments, and methodologies for such payments, as set out in a draft contract will likely be prudent and efficient.
Transgrid’s application sets out the terms for system strength services to be procured by Transgrid from Snowy Hydro, and provides information to justify the prudency and efficiency of these terms against the AER’s assessment criteria set out in the AER’s System security network support payment guideline.
Transgrid’s application includes redactions of confidential information on the terms of the contract, and on the commercial negotiations between Transgrid and Snowy Hydro Ltd.
We have also published Transgrid’s confidentiality claim for these redactions.
We have invited energy consumers and other interested parties to make submissions on Transgrid’s system security contract review application by close of business 10 November 2025.