Growing unreliability in Australia's ageing coal fleet is driving up power prices, intensifying calls for a structured national closure plan. The pressure is mounting as NEM spot prices climbed 6.3 per cent week-on-week to average $91.11/MWh, a trend linked directly to the escalating failure of legacy thermal assets. This market signal underscores the urgent need to manage the exit of unreliable generators to protect households and industry from continued cost pressures.
The economic case for replacement technologies continues to shift, favouring faster, more modular solutions. In its final 2025-26 GenCost report, CSIRO revised capital cost estimates for pumped hydro upwards while reducing projections for battery storage. This updated analysis lands as the federal government added 11 new projects, including over 4 GWh of battery storage, to its National Renewable Energy Priority List, signalling clear policy direction.
Tangible progress on the ground is accelerating. A major listed coal miner received state approval to convert a retired mine into a 300 MW solar and pumped hydro hub with 12 hours of storage (3.6 GWh). This project exemplifies the site repurposing trend gaining momentum across the NEM. Meanwhile, a massive 1.1 GW Queensland wind project secured federal environmental approval, clearing its final planning hurdle after being paused by the state government in 2025.
On the demand side, the federal government is moving to ensure new industrial loads do not strain the grid. Prime Minister Anthony Albanese announced plans to impose a legal obligation on data centres to underwrite new renewable projects to meet their own consumption. The proposed mandate aims to directly link large-scale demand growth with new supply, though the policy faces potential opposition from the LNP.
Broader transition efforts are also maturing, focusing on supply chains and long-term liabilities. Gina Rinehart-backed Arafura Rare Earths secured a funding and supply deal to manufacture permanent magnets for wind turbines and EVs, bolstering domestic critical mineral processing. In a cautionary note, the collapse of an oil and gas firm with a $200 million clean-up bill has prompted the renewables sector to proactively review its own site remediation and decommissioning strategies to avoid future taxpayer liabilities.
Europe's market offers a glimpse into Australia's high-penetration future, where a record 129 TWh of solar generation in the second quarter drove a surge in negative electricity prices. This is forcing European storage and flexible generation operators to shift from day-ahead auctions to shorter-term markets to capture value. The trend highlights the growing importance of sophisticated trading strategies and asset flexibility as the transition advances.