than its politics can handle
| Key Points |
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A country wired for another century
The transmission towers outside Dubbo cut through paddocks burnt brown by drought.
Beneath them sit new battery containers, white and anonymous, lined beside solar arrays that stretch towards the horizon. The old coal system still hums in the distance.
Yet the future already occupies the same landscape.
Australia’s energy transition has become a race between engineering and physics. Coal stations are ageing faster than governments expected. Data centres are multiplying. Electricity demand, flat for years, has started climbing again.
Into that uncertainty came a new report from the International Renewable Energy Agency (IRENA), claiming that “firm” renewable electricity can now outcompete fossil fuels on cost in many markets. 1
The claim lands at a volatile moment. Households face rising network charges despite periods of collapsing wholesale electricity prices. Renewable projects struggle through community resistance and planning delays. The opposition’s nuclear proposal has reopened arguments many energy economists thought settled years ago.
IRENA’s report introduces a new metric called “firm LCOE”, or firm levelised cost of electricity. The measure attempts to price renewable electricity not merely when the wind blows or the sun shines, but continuously through combinations of solar, wind and batteries. In prime regions, the agency argues, hybrid renewable systems now rival or beat new gas and coal generation on price. 1
Behind the neat graphs sits a more complicated reality. Grid operators do not run power systems on averages. They prepare for terrible days.
The missing hours
Across Europe, energy planners use a German word that now appears regularly in Australian briefings: Dunkelflaute. A dark wind lull. Days when clouds sit over solar farms while wind generation collapses across entire regions.
IRENA acknowledges those events but largely models reliability through statistical resource combinations and battery optimisation rather than extreme multi-week stress scenarios. 4 Critics argue that distinction matters. Short-duration lithium-ion batteries can shift solar output from midday into evening peaks. Seasonal reliability remains another problem entirely.
The economics in the report depend on continued declines in battery costs. Since 2010, battery storage costs have fallen by more than 90%, according to IRENA. 2 The report projects further declines of roughly 30% by 2030. If those curves flatten under mineral shortages, trade wars or higher financing costs, the economics change sharply.
Engineers inside Australia’s electricity market already understand the dilemma. The National Electricity Market stretches more than 5,000 kilometres across fragile transmission corridors. Bushfires, storms and heatwaves increasingly strike simultaneously with demand spikes. During severe summer events, reliability depends not simply on energy availability but on system strength, inertia and rapid frequency control.
Coal turbines once provided those services automatically through heavy spinning machinery. Inverter-based renewables can replicate some functions through software and synthetic inertia. Yet even optimistic planners rarely argue the transition is complete.
Gas remains embedded in many transition models as insurance against prolonged reliability gaps. That includes scenarios inside the Australian Energy Market Operator’s Integrated System Plan. 3
The Chinese cost floor
The report repeatedly identifies China as defining the global “cost floor” for firm renewables. 6 That phrase carries geopolitical weight.
Cheap Chinese manufacturing helped collapse global solar and battery prices over the past decade. Australian households benefited directly. So did developers building giant renewable zones across Queensland, Victoria, and New South Wales.
Yet the same concentration worries strategic analysts. Australia spent decades warning about dependence on Middle Eastern oil while building an energy transition reliant on Chinese solar modules, battery cells and mineral processing.
Trade tensions already complicate the picture. The United States and Europe are expanding tariffs and industrial subsidies to rebuild domestic manufacturing. If protectionism deepens, renewable costs may rise rather than continue their downward trajectory.
The transition also shifts extraction pressures rather than eliminating them. Lithium mines in Western Australia, nickel processing in Indonesia and cobalt extraction in the Democratic Republic of Congo now sit at the centre of global energy security calculations. The clean-energy economy still depends on industrial supply chains, shipping routes and geopolitical leverage.
IRENA frames renewables partly as an energy independence project. The argument contains truth. Wind and sunlight cannot be embargoed. Battery supply chains can.
The Australian bottleneck
In the Riverina, farmers opposing new transmission corridors have become unlikely protagonists in the national energy debate. The towers crossing their properties are not abstract climate policy. They are steel structures cutting through grazing land.
Australia’s renewable expansion increasingly collides with the slower realities of transmission construction. Renewable Energy Zones remain delayed by planning disputes, labour shortages and rising construction costs. Some solar farms now sit constrained because the grid cannot absorb their output.
IRENA’s cost comparisons focus largely on generation and storage economics rather than the full cost of system-wide integration. 1 Critics argue that omission matters. Building a renewable-heavy grid requires thousands of kilometres of transmission, synchronous condensers, backup reserves and complex digital control systems.
The result creates a political paradox. Wholesale prices can fall during periods of abundant renewable generation while household bills continue rising because network costs expand simultaneously.
Western Australia exposes another challenge. Unlike the eastern states, the South West Interconnected System remains relatively isolated. Interconnection cannot smooth variability across multiple regions as easily as in Europe. Reliability therefore depends more heavily on local storage and backup generation.
Australia’s geography still provides advantages. Strong solar resources, high wind quality and vast land areas make hybrid renewable systems unusually competitive. IRENA identifies Australia as approaching fossil-fuel parity for firm renewables, particularly in strong wind corridors. 1
The question is no longer whether renewables dominate new generation investment. They already do. The harder question concerns the speed at which storage, transmission and industrial electrification can scale together.
References
1. ↩ IRENA, 24/7 renewables: The economics of firm solar and wind
2. ↩ IRENA press release on firm renewable costs
3. ↩ Australian Energy Market Operator, Integrated System Plan
5. ↩ IRENA on AI and data-centre demand