‘Announcement fever’ blamed for Snowy 2.0 cost debacle - AFR

Snowy Hydro 2.0's cost has blown out significantly, with insiders citing "announcement fever" as a driver of poor initial estimates. The project, a 50-gigawatt-hour pumped-hydro scheme designed to store renewable energy, was scoped and costed under political pressure to deliver a headline-grabbing energy solution. The result: early cost and timeline projections were not robust, and the scheme has since become more expensive and delayed.

Where this fits

This is a core Energy Realism problem: the whole-system cost of a renewables grid is routinely undercounted because the firming infrastructure, storage, transmission, peaking plant, is costed separately, often poorly, and always after the renewable capacity gets the political win. Snowy 2.0 was sold as the answer to renewable intermittency. Its cost blow-out is not a quirk of one project; it is a pattern. Firming is expensive, and the real cost of a renewables-only grid includes not just panels and wind turbines but the hydro, batteries, transmission, and gas backup needed to keep the lights on when the sun does not shine and the wind does not blow.

What it means

Australia is building an energy system whose reliability rests on infrastructure that was underestimated, delayed, and now significantly more costly than promised. A grid dependent on weather and storage is also a grid dependent on the pace and cost of completing that storage. Delay in Snowy 2.0 means the renewable capacity built ahead of it will lean harder on gas firming for longer. The alternative, firm, dense, low-material nuclear generation, remains banned by law while costs for the renewable-plus-storage path climb.