Public consultation has opened on ElectraNet’s stage 1b contingent project application for the Northern Transmission Project, a major proposed upgrade to South Australia’s high-voltage electricity network designed to support renewable energy growth and rising industrial demand.

The application, submitted to the Australian Energy Regulator (AER) on 21 January 2026, seeks approval for $29.5 million (nominal) in capital expenditure to progress early works for the project, formerly known as the Mid North South Australia Renewable Energy Zone (REZ) Expansion.

A contingent project application outlines the revenue a network business is seeking to recover from customers to deliver a defined stage of a larger infrastructure project. In this case, ElectraNet’s stage 1b proposal focuses on preparatory activities required ahead of any construction decision.

The proposed early works expenditure covers stakeholder and community engagement, land use planning and acquisition, development and environmental approvals, and broader project development and procurement activities. These steps are intended to de-risk later stages of the project and inform final investment decisions under the Regulatory Investment Test for Transmission (RIT-T).

The AER’s role is to assess whether the proposed costs are prudent and efficient, ensuring electricity consumers pay no more than necessary. The regulator expects to make a determination on the application in the coming months and has invited stakeholder submissions by close of business Friday, 20 February 2026.

The Northern Transmission Project is being developed by ElectraNet, South Australia’s transmission network service provider, and represents a reframing of the Mid North SA REZ Expansion identified in the Australian Energy Market Operator’s Integrated System Plan. While the name has changed, the underlying objective remains: Expanding transmission capacity to unlock new renewable generation and support future electricity demand.

Early planning indicates the project could involve two major high-capacity transmission lines: One connecting the Bundey substation in the Mid North to Greater Adelaide, and another linking Bundey northwards to Whyalla via the proposed Cultana East substation. Together, these connections are intended to strengthen power flows across the state and improve access to renewable resources in regional South Australia.

Beyond enabling additional wind and solar generation, the project is positioned to support industrial and economic growth, including large loads from mining and manufacturing, while enhancing energy security for key population centres.

The Northern Transmission Project has been identified as actionable in planning documents but remains subject to detailed assessment, regulatory approval and ongoing community engagement before construction can proceed. For now, the stage 1b application marks a critical step in moving South Australia’s next major transmission upgrade from planning into delivery.

The AER welcomes submissions on the stage 1b contingent project application for the Northern Transmission Project by Friday 20 February 2026. For more information or to make a submission, visit the AER website.