The Battery of the Nation: Tasmania's Renewable Energy Future

Tasmania's electricity system, drawing more than 90 percent of its generation from the hydroelectric stations that have harnessed the rainfall and rivers of the western and central highlands since the early twentieth century, is the most complete existing renewable energy system in Australia and the model that the national energy transition is seeking to replicate with the solar and wind additions that the continental grid requires. The combination of Hydro Tasmania's generation capacity and the wind farms that have been constructed on the exposed ridges of the midlands and the northwest coast provides a generation mix that can be managed to follow the variable demand of the state and, increasingly, to export to the mainland.

The Marinus Link, the proposed second electricity interconnector between Tasmania and Victoria that would double the cable capacity connecting the island to the mainland grid, is the infrastructure investment that would allow Tasmanian renewable generation to serve the mainland's energy needs at the scale that the national energy transition requires. The project's economics depend on the value that Tasmania's renewable generation and storage capacity provides to the mainland grid, particularly as the variability of solar and wind generation creates the need for the flexible response that Hydro Tasmania's reservoir storage can provide.

The Battery of the Nation concept, Tasmania's strategic positioning as the store of renewable energy that the mainland grid draws on when solar and wind generation is insufficient to meet demand, requires the Marinus Link to provide the connection that the energy trade depends on. The concept's viability, and the economic case for the significant investment that the interconnector requires, has been the subject of the modelling and assessment that the government and the energy sector have been conducting as the national energy transition advances.

The hydrogen economy opportunities that Tasmania's renewable energy excess potentially supports, including the production of green hydrogen from the surplus renewable generation for export or for use in decarbonising industrial processes, represent the longer-term economic development opportunity that the renewable energy transition creates for a state with abundant renewable resources and the manufacturing and port infrastructure that export trade requires.

This article was compiled by AI from the sources linked above and screened before publishing. See our editorial standards.