Fifth hearing of the New South Wales parliamentary inquiry into data centres hears warnings that more than 90 facilities already operating in the state could overload parts of the grid by 2033 and force higher household electricity bills unless operators are required to…
When school staff in Virginia were told to turn off corridor lights so nearby data centres could keep running, it crystallised a question that has now reached Sydney: when artificial-intelligence demand pulls ever more megawatts through the grid, who should pay for the extra wires and generating capacity?
That question sat at the centre of the fifth hearing of the New South Wales parliamentary inquiry into data centres this week, where legal and energy experts warned that more than 90 facilities already operating in the state could push household electricity bills higher and overload parts of the grid by 2033 if rules do not change. The warnings place the fast-growing AI build-out at the heart of a cost-allocation fight that has already triggered similar reviews in the United States, Ireland and Singapore.
NSW Energy Minister Penny Sharpe told the parliamentary inquiry that the biggest concern for state energy ministers was ensuring that data-centre energy demand does not hurt households and businesses. She framed the principle that operators should be required to pay for the full cost of their footprint, not just connection charges, so the upgrades their load makes necessary are not cross-subsidised by other customers. Operators named in the inquiry's evidence include AirTrunk, Microsoft, Amazon and NextDC, all running major facilities in the state.
The grid-side evidence is more concrete than the bill-side warning. Transgrid, the state's high-voltage transmission operator, has told the inquiry that the data-centre rush will push some parts of the New South Wales network to capacity by 2033 and is already producing what its analysis describes as a "logjam of loads": a queue of new connections that cannot all be served at once. The state's distribution network service providers, which carry electricity the last mile to homes and businesses, made a separate written submission flagging that data-centre connections at the distribution level would also need new rules if smaller customers were not to cross-subsidise industrial-scale loads.
University of Sydney law professor Penelope Crossley told the inquiry that the Virginia example was a cautionary tale rather than a forecast. In northern Virginia, where data centres concentrate around Loudoun County, schools have at times been asked to dim lights and shift demand so the local grid can serve server farms. Crossley also pointed to backup-power rules, and to the choice between diesel generators and grid-connected batteries, as one of the design decisions Australian regulators will have to make.
The industry's response has so far stressed flexibility rather than resistance. AirTrunk, a major hyperscale data-centre operator, has said it "stands ready to flex and invest in the grid" so that new demand does not translate directly into higher household costs, and lodged a late submission to the Australian Energy Market Commission's Package 2 consultation.pdf) on how new loads should pay their way.
University of Sydney physics professor David Reilly offered a more constructive note for the close of the hearing. Local advances in low-power computing, combined with the long-term promise of quantum hardware, could in time cut the electricity required to train and run AI systems, easing the load rather than forcing the grid to chase it.
What to watch next: the inquiry's final report, expected later this year, will recommend whether New South Wales requires data-centre operators to underwrite the full cost of grid upgrades they trigger, and whether backup-power rules should be written before the 2033 capacity crunch arrives.