Two curiosities about upcoming outages at Eraring Power Station - WattClarity

Eraring Power Station, NSW's largest coal-fired generator, is scheduled for two substantial maintenance outages this financial year. WattClarity flagged two oddities in the published outage calendar: the timing overlaps with seasonal demand peaks, and the duration appears longer than typical maintenance cycles for similar work. The station is due to close in 2025, which may explain both the scope of the work and the scheduling pressure as the operator runs down assets ahead of decommissioning.

Where this fits

Eraring's outages expose the reliability cost of retiring firm power without firm replacement. A coal station shutting down leaves a gap that must be filled by either dispatchable gas or weather-dependent renewables plus batteries. If outages hit during high-demand periods, and thermal plant maintenance often does, the grid must lean harder on gas or manage scarcity. This is not a curiosity about one station; it is the pattern playing out across the NEM as coal closes and the transition scrambles to backfill with sources that cannot guarantee output when the grid needs it most.

What it means

Australia is dismantling its fleet of controllable, always-available generators on a timeline driven by policy and finance, not by the readiness of replacements. Each major coal closure creates a window of vulnerability that firming sources must cover. Without new firm capacity, and nuclear remains legally barred, that burden falls to gas, which is expensive, emits carbon, and ties Australia to global commodity markets. The grid is becoming more dependent on both weather and fossil fuels at the same time it is supposed to decarbonize.