Data centres could use twice the power of all the houses in Sydney - AFR

Analysis of a report projecting Australian data centre power demand to reach twice the current residential load of Sydney.

The AFR reports on modelling showing data centre electricity consumption could double Sydney's household demand. The figures reflect growth in AI compute capacity, cloud services, and digital infrastructure. No timeline or specific demand forecast is stated in the article beyond this comparison metric. The piece signals a major incoming load on the grid but does not detail how supply will meet it or at what cost.

Where this fits

This is a reliability and cost story. Data centres demand firm, dispatchable power 24/7. A renewables-only grid cannot supply that without gas backup and massive battery or pumped-hydro storage. Australia is already planning to overbuild transmission to move intermittent wind and solar across the continent; a doubling of baseload data centre demand compounds that problem and drives the need for either more gas, more storage (China-sourced batteries, land-intensive hydro), or the firm alternative currently banned by law: nuclear. The cost of firming a renewables path to meet this load has not been counted in grid transition models.

What it means

Australia faces a choice between locking in gas as the de facto backup fuel for decades, or reconsidering the regulatory ban on nuclear. Data centres represent wealth creation, but they also represent a stress test on the National Electricity Market. If policy continues to exclude firm, low-emission generation from the supply mix, Australia will either burn gas to keep servers running or constrain digital growth. The sovereignty angle sharpens here too: battery supply chains are dominated by China. A data centre boom powered by renewables plus Chinese batteries is growth on someone else's terms.