Ideology flushes common sense into Snowy money pit - The Australian

The Snowy Hydro 2.0 expansion, originally budgeted at $10.3 billion, has blown out significantly and faces mounting criticism for poor project management and scope creep. The scheme, which would add 2,000 megawatts of pumped-hydro capacity to Australia's largest hydroelectric system, has become a focal point for debate over whether the money and engineering effort would be better deployed elsewhere in the grid.

Where this fits

Snowy 2.0 is a textbook case of the hidden costs that renewables-heavy grid planning incurs. Pumped hydro is dispatchable and long-lived, but capital-intensive and site-constrained. Australia is betting heavily on it as the firming backbone for a renewables grid, yet the blowout suggests the whole-system cost arithmetic of a weather-dependent network is being discovered late and at taxpayer expense. The project embodies a deeper problem: firm power is expensive to add to a grid already built around cheap renewables, and Australia has legally excluded the one firm, low-emission, low-material alternative that could firm the grid more cheaply over the long run.

What it means

Cost overruns on Snowy 2.0 compress Australia's firming options and tighten the grid's dependence on gas for the next decade. Every dollar spent remedying a renewables-dependent grid's inherent intermittency is a dollar not spent on supply chain sovereignty or manufacturing resilience. The firming infrastructure Australia is forced to build is expensive precisely because it must work around the weather-dependent output of solar and wind. A firm, energy-dense generation source would solve this problem at lower capital cost and without the mineral extraction, processing, and China supply-chain exposure that batteries and panels demand.