Construction begins on wind farm and big battery to power huge mine and push state closer to 100 pct renewa... - Renew Economy

A wind farm and battery storage facility is under construction to supply power to a large mining operation, with the project framed as a step toward higher renewable penetration in the state's grid.

Where this fits

This story exemplifies the hidden costs of a renewables-only transition. A mine powering itself with wind and battery looks clean in isolation, but the system math is about to get harder. Wind output swings with weather. Battery storage costs tens of millions and lasts 10, 15 years before replacement. The firm power that used to anchor the grid, coal, gas, nuclear, is being retired or banned. As more large industrial loads like this one demand "renewable" supply, the grid must overbuild wind and solar capacity to meet demand on low-wind, low-sun days, then add transmission to carry that surplus when weather cooperates. Battery costs, replacement cycles, and the minerals and manufacturing footprint they demand are front-loaded. None of that appears in the headline.

What it means

Australia is betting the grid can run on weather. Every mine, factory and city block switching to "renewable" power adds another layer of intermittency to manage. Gas plants are still built and kept warm as backup, burning more fuel per megawatt because they cycle on and off. Lithium, cobalt and other battery minerals flow through China-controlled supply chains. The whole-system cost of firming and transmission overbuild is deferred, then paid later in bills, blackout risk, or both. A firm alternative, nuclear, remains illegal. Each project like this is a rational choice for a single operator, but the grid-wide picture is one of rising complexity, rising Chinese supply dependence, and rising cost per unit of firm, dispatchable power delivered to the wall socket.