Mining drives doubling electricity demand in South Australia
South Australia is on the verge of a ‘once-in-a-generation’ economic growth opportunity, underpinned by affordable, reliable and sustainable electricity, according to a report by ElectraNet.The 2026 Transmission Annual Planning Report (TAPR) shows that interest to connect to South Australia’s transmission network is at its highest level in decades, and attributes this to the strength of the state’s grid and renewable electricity generation.Peak electricity demand is forecast to double over the next 15 years, from 3.3GW currently to more than 6.5GW, according to TAPR figures.The 2026 TAPR shows increased connection demand is expected in greater Adelaide, the mid-north and south-east as a result of data centres and the AI boom, as well as defence industry development at the Osborne naval shipyard.In the Eyre Peninsula and Upper Spencer Gulf regions, growth will be driven by the mining and minerals sector, steel production reinvigoration at Whyalla and the Northern Water project.The Eyre Peninsula includes, and is close to, resources that are crucial in supporting this expected growth including high quality renewable energy sites.ElectraNet chief executive Simon Emms says the TAPR points to South Australia entering a period of economic growth with thousands of jobs being created, underpinned by the state’s world-leading renewable electricity system.“South Australia is facing a jobs boom as industries seek to access the State’s unique combination of valuable minerals and world-class wind and solar renewable energy,” he said.“As industries such as mining, steelmaking, defence and AI expand, the demand for electricity in the state is set to grow significantly.“We have the opportunity set the new global standard for a modern economy, where rapidly growing business and industry are supported by clean energy.“Timely investment in the transmission network will be the key to unlocking this economic growth across South Australia and the thousands of jobs that come with it.”Realising this enormous growth opportunity hinges on planning and enhancement of infrastructure to keep up with rapidly growing electricity demand.South Australia still has an abundance of untapped renewable energy potential in the north of the state to provide affordable, reliable and sustainable electricity supply to support this growth opportunity.“Transmission infrastructure will be vital to create an electricity superhighway, taking energy from the source to where it is needed, and managing the peaks and troughs of demand,” Mr Emms said.“So while South Australia has an exciting economic opportunity ahead, we must have the ability to take it.“It is vital that we get the planning right and that regulators and governing bodies continue to evolve with us as we tackle truly unique energy circumstances.”The TAPR highlights three proposed transmission projects that will be important to South Australia’s growth over the next 15 years.The Eyre Peninsula upgrade, anticipated between 2027 and 2028, will increase the transmission capacity by enabling the Cultana–Yadnarie lines to operate at 275kV. This project will be vital to mining and manufacturing growth in the region and will also unlock new renewable energy generation.The Northern Transmission project (NTx), which is currently in early planning stages, will extend the transmission network’s capability across the northern and eastern parts of South Australia to vastly increase network reliability.The South-East Expansion project aims to improve access to the transmission network and support future industrial growth such as timber processing, food manufacturing and biomass and wind energy generation.Having supported the state until now, traditional energy assets throughout the Adelaide metro region are being retired, including the Torrens Island Power Stations, and being rapidly replaced by batteries in areas to the north of Adelaide.The next two decades will see these trends continuing, supported by the South Australian Government’s renewable release areas, according to ElectraNet.
