Datacentre power dispute exposes gaps in Australia’s renewable energy build-out

A dispute over the power sources for new datacentres in Australia has exposed a significant gap in the pace of renewable energy construction. Federal Energy Minister Chris Bowen reiterated the government’s intent to legislate binding national standards requiring datacentres to use 100% renewable electricity, backed by firming sources such as gas. This federal position conflicts with the Queensland and Northern Territory governments’ preference for utilising state-owned gas and coal power stations, resulting in a national cabinet communique that offered limited clarity on final rules.

The federal government has indicated it would consider concessions for state-owned generation only if it provides a cheaper power mix. However, electricity costs constitute approximately 10% of total datacentre expenditure, and gas is identified as the most expensive form of generation. New coal is more expensive than new renewables, while existing coal is often undercut by cheap solar for much of the day. Existing datacentres are already choosing to run on about 70% renewable electricity via power purchase agreements to manage costs, suggesting that relying on fossil fuels would likely increase expenses and delay development due to long waitlists for gas turbines.

Geography also plays a decisive role in the debate. Eighty-five per cent of proposed datacentres are located in Sydney and Melbourne due to proximity to population centres, which is essential for instantaneous data transfer. This concentration suggests that a fossil-fuel-driven datacentre boom in Australia’s north is unlikely unless population patterns shift markedly. Conversely, if new wind and solar farms cannot be built as fast as new datacentres in New South Wales and Victoria, this will act as a brake on growth.

The datacentre debate is only one part of a larger challenge facing the electricity sector. Datacentres are projected to make up just 17% of future power demand growth. The remainder is driven by increased uptake of electric vehicles, households and businesses converting to electricity, and population growth. Apart from the two years Australia had a carbon price, electricity generators have never been forced to reduce their emissions, meaning the current approach of pushing renewables into the mix is now bumping up against its limits.

To resolve these core problems, the sector requires restrictions on electricity emissions and accelerated construction of renewables, transmission lines, and storage. A much bigger electricity system is needed to meet all future demand. As noted in analysis from The Guardian, datacentres serve as the first test of how well Australia can meet this challenge, with the outcome dependent on whether governments can make it easier to finance and build the necessary infrastructure.