Project timeline

Overview

Initiation
AER position
Proposal
Draft decision
Revised proposal
Final decision
Updates
Update – Application to reopen for capex – Project EnergyConnect

On 13 February 2026, Transgrid applied to the AER to revoke and substitute its electricity transmission revenue determination for the 2023–28 regulatory control period, to adjust total forecast capital expenditure (capex) approved for Project EnergyConnect (PEC) in our April 2023 final decision. 

Stakeholder submissions on Transgrid’s reopener application closed on 28 April 2026.

Application

Transgrid has submitted the following materials in support of its reopener application.

Project EnergyConnect - An application to reopen the 2023-2028 Revenue Determination - Transgrid - 20260213
PDF (1.54MB) View details

Authors
Transgrid
Document

Project EnergyConnect confidentiality claims register - Transgrid - 20260320
DOCX (1.45MB) View details

Authors
Transgrid
Document

Attachment 1 - Stakeholder engagement - Transgrid - 20260213
PDF (891.62KB) View details

Authors
Transgrid
Document

Attachment 2 - Project EnergyConnect and Contract Failure - Transgrid - 20260213
PDF (1.2MB) View details

Authors
Transgrid
Document

Attachment 3 - Rectification actions and options report - Transgrid - 20260213
PDF (936.02KB) View details

Authors
Transgrid
Document

Attachment 4 - New arrangements to deliver PEC - Transgrid - 20260213
PDF (832.96KB) View details

Authors
Transgrid
Document

Attachment 5 - Governance arrangements - Transgrid - 20260213
PDF (766.56KB) View details

Authors
Transgrid
Document

Attachment 6 - Rules Pre-conditions - Transgrid - 20260213
PDF (1.07MB) View details

Authors
Transgrid
Document

Attachment 7 - Reopener capex methodology - Transgrid - 20260213
PDF (851.72KB) View details

Authors
Transgrid
Document

Appendix 2a - Letter of support - Elecnor Australia - 20251113
PDF (833.23KB) View details

Authors
Transgrid
Document

Appendix 2b - Cost Estimation Reports - Fission - 20230814 and 20230817
PDF (8.13MB) View details

Authors
Transgrid
Document

Appendix 3a - Net market benefits assessment - Transgrid - 20250304
PDF (1.38MB) View details

Authors
Transgrid
Document

Appendix 3b - Net market benefits NPV model (forward looking) - Transgrid - 20250328
XLSX (570.2KB) View details

Authors
Transgrid
Document

Appendix 3c - Net market benefits NPV model (total)- Transgrid - 20250328
XLSX (571.81KB) View details

Authors
Transgrid
Document

Appendix 3d - Gross market benefits assessment - EY - 20250224
PDF (9.1MB) View details

Authors
Transgrid
Document

Supplementary Information 3di - Statement of Facts - Market benefits assessment and loop flows - GHD - 20250208
PDF (4MB) View details

Authors
Transgrid
Document

Supplementary Information 3dii - Technical Memo - Reduction of Minimum Synchronous Generators in SA - GHD - 20250208
PDF (3.81MB) View details

Authors
Transgrid
Document

Appendix 4a - Independent estimate to complete report - Turner & Townsend - 20250908
PDF (7.5MB) View details

Authors
Transgrid
Document

Appendix 4b - Project EnergyConnect new contract review - E3 Advisory - 20260304
PDF (2.24MB) View details

Authors
Transgrid
Document

Appendix 4c - Project EnergyConnect - Benchmark Report - KPMG - 20250601
PDF (14.35MB) View details

Authors
Transgrid
Document

Appendix 6a - Statement of facts - reliability and security impacts - GHD - 20251212
PDF (9.18MB) View details

Authors
Transgrid
Document

Appendix 6b - Letter of support - ElectraNet - 20250818
PDF (571.72KB) View details

Authors
Transgrid
Document

Appendix 7a - Capex forecast model - 20260213
XLSM (776.68KB) View details

Authors
Transgrid
Document

Appendix 7b - Labour and Indirects model - 20260213
XLSX (290.46KB) View details

Authors
Transgrid
Document

Appendix 7c - Post-tax revenue model - Transgrid - 20260213
XLSM (2.01MB) View details

Authors
Transgrid
Document

Submissions

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We invited energy consumers and other interested parties to make submissions on Transgrid’s reopener application. Submissions closed on 28 April 2026. 

AGL Energy - Submission - Transgrid’s application to reopen capex - Project EnergyConnect - April 2026
PDF (231.92KB) View details

Authors
AGL Energy
Document

Energy Networks Australia - Submission - Transgrid’s application to reopen capex - Project EnergyConnect - April 2026
PDF (213.33KB) View details

Authors
Energy Networks Australia (ENA)
Document

Infrastructure Partnerships Australia - Submission - Transgrid’s application to reopen capex - Project EnergyConnect - April 2026
PDF (459.05KB) View details

Document

Justice and Equity Centre - Submission - Transgrid’s application to reopen capex - Project EnergyConnect - April 2026
PDF (477.73KB) View details

Authors
Justice and Equity Centre
Document

Nexa Advisory - Submission - Transgrid’s application to reopen capex - Project EnergyConnect - April 2026
PDF (931.46KB) View details

Authors
Nexa Advisory
Document

Gavin Dufty and Louise Benjamin - Submission - Transgrid’s application to reopen capex - Project EnergyConnect - April 2026
PDF (491.96KB) View details

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