AEMO warns on energy shortages after coal closures - MacroBusiness

AEMO has issued a warning that coal plant closures are creating a risk of energy shortages, particularly during peak demand periods. The grid operator flagged that the retirement of coal capacity is outpacing the addition of firming capacity to replace it, leaving a gap between dispatchable supply and demand at times of stress.

Where this fits

This is the core Energy Realism story: Australia is removing firm, dispatchable generation faster than it is building firm, dispatchable replacement. AEMO's warning confirms what the numbers have shown for years. The grid is being rebuilt around weather-dependent renewables, which are cheap per megawatt-hour but cannot guarantee supply when the sun does not shine or the wind does not blow. That gap is being filled by gas peaking plants, which operate at low capacity factors and high fuel cost, and by the hope that battery storage will mature at scale. Neither of those is firm power. Australia has a third option, nuclear, banned by law, which would provide dispatchable, low-carbon capacity with no fuel-supply volatility and minimal material demand compared to the battery overbuild now required.

What it means

AEMO's warning is a statement that current policy is building a system that cannot reliably meet demand without either accepting blackouts, running expensive gas plants more often, or accelerating the build-out of battery storage whose cost and supply-chain dependence on China have not yet been fully acknowledged. The gap is real. Closing coal plants while firming capacity lags is not a technical oversight. It is the design of the current policy. The cost and reliability burden is shifting to the system as a whole.