Business warns Cook’s 75pc green grid target leaves industry exposed - AFR

Australian industry has warned that a 75 per cent renewables target will leave businesses exposed to grid reliability and cost risks. The warning appears in response to South Australian Premier Peter Malineux's grid decarbonisation commitments. Business groups flagged concerns that a predominantly renewable system lacks sufficient firm generation to meet demand during low-wind, low-sun periods, and that the transition costs and infrastructure requirements have not been fully costed or disclosed.

Where this fits

This is the reliability and cost pressure made visible. A 75 per cent renewable grid requires either massive battery storage (whose upfront capital cost and supply-chain dependence on China compounds the bill) or firm generation filling the gap. Industry's concern maps directly to the Energy Realism frame: renewables are cheap per megawatt-hour, but a whole-system transition to 75 per cent penetration without firm dispatchable power forces a choice between rolling blackouts and sustained reliance on gas peaking plants. The excluded option, replacing retiring coal with nuclear baseload, remains off the table by law, even though it would provide both the firm power and the lowest-lifecycle emissions output that this grid architecture requires.

What it means

Australia is designing a grid that will demand either continuous gas firming (raising emissions, fuel costs, and exposure to global gas prices) or unprecedented battery deployment (raising mineral extraction, supply-chain risk, and dependence on Chinese battery makers). Industry's caution signals the first honest friction point: a renewables-led transition at this speed and depth cannot be financed or stabilised without either accepting higher operating costs and energy insecurity, or building firm generation. The firm alternative sits legally unavailable.