Folly of battery reliance exposed by windless power price spike - The Australian

Australia experienced a power price spike during a period of low wind generation, revealing the grid's vulnerability to weather-dependent supply. Batteries, positioned as a key firming tool, proved insufficient to meet demand when wind output fell. Wholesale prices rose sharply as the system scrambled for supply, exposing the cost of relying on storage and renewables alone to manage generation shortfalls.

Where this fits

This is a live test of the renewables-plus-batteries model under stress. When wind generation drops and solar output is low (typically evening), the grid must either draw on stored battery capacity or call on dispatchable generation. The spike shows two things: that battery reserves are finite, and that when they deplete, the system has no firm power to lean on. This is a reliability problem, a cost problem, and a materials problem rolled into one. Australia is spending billions on battery storage to do work that firm dispatchable power, gas, coal, or nuclear, does continuously without weather risk. The cost of that redundancy is now visible in wholesale prices.

What it means

Grid reliability during low-wind periods will depend on either massive overbuild of battery capacity (exponentially more expensive), or maintaining gas generation as a backstop (locking in emissions and fuel import exposure), or building firm nuclear capacity (currently illegal). Each option has a different cost curve and security profile. The Australian grid is paying the price of choosing the first path while keeping the second as a grudging safety net. The third option remains foreclosed, despite being the only zero-carbon firm alternative that reduces both emissions intensity and supply-chain dependence.