Bold claim: Datacentres are skyrocketing in energy demand and could steer Australia away from its net-zero targets if growth isn’t managed carefully. But here’s the deeper picture to understand what’s at stake and what the future might look like.
Key context
- Australian datacentres currently account for about 2% of electricity from the National Grid, roughly 4 terawatt hours (TWh). Projections from the Australian Energy Market Operator anticipate this share rising rapidly—about 25% year-on-year—to reach 12 TWh (6% of grid demand) by 2030, and 12% by 2050. This implies substantial future electricity needs for the sector, with noticeable impacts on major cities like Sydney and Melbourne.
- In NSW and Victoria, where most facilities are located, datacentres could constitute 11% and 8% of each state’s electricity demand by 2030, respectively. Such shares stress local grids and could influence energy planning and pricing in these states.
Why datacentres matter for energy and climate goals
- The global trend shows datacentres growing much faster in energy use than other sectors. The International Energy Agency notes that hyperscale AI-focused datacentres can consume as much electricity annually as 100,000 households. This underscored scale amplifies both the opportunities and the challenges of integrating such loads with renewables and storage solutions.
- Heat and cooling drive much of datacentre energy use. When tens or hundreds of thousands of servers operate in close quarters, their heat output requires substantial cooling, mostly via air conditioning or water-based systems. This adds to overall electricity demand beyond the servers themselves.
- Analysts caution that growth in power draw isn’t simply because more users or more throughput are needed, but may reflect intensifying energy use per unit of activity, possibly linked to pervasive AI workloads. The practical question is whether this reflects a shift toward cleaner energy or a continuation of fossil-fuel-backed grid reliability to meet peak loads.
Potential implications for energy price and policy
- If demand accelerates faster than renewable capacity expansion, electricity prices could rise as grids invest in new generation and backup capacity to meet the load. This dynamic could complicate emissions targets, since new or extended fossilfired generation or gas turbines might be deployed to stabilize supply.
- The Climate Change Authority and energy system researchers highlight that datacentres, due to their large, inflexible loads, can intensify pressure on regional power sources and renewable buildouts. The policy implication is a need for complementary investments in energy generation, cooling technologies, and demand-side management to align datacentre growth with decarbonization goals.
What this means for households and the broader economy
- By 2035, forecasts suggest datacentre electricity demand could reach about 21.4 TWh, which is near the annual consumption of Australia’s aluminium smelters. This scale underscores the importance of integrating datacentre planning with national energy strategies to avoid sudden price spikes or reliability issues.
- Experts emphasize that renewables deployment must keep pace with datacentre growth to prevent the carbon intensity of electricity from rising. If renewable growth lags, the net effect could hinder coal phaseout timelines and slow progress toward emissions targets.
A final thought to consider
- The core question for policymakers and the public: Can Australia grow its data infrastructure while simultaneously accelerating clean energy and cooling innovations to deliver a net-zero future, or will datacentres end up driving higher emissions and higher prices unless carefully managed? Share your views below: should datacentre expansion be prioritized alongside aggressive renewable deployment, or should growth be tempered until the grid is better prepared?
