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Amazon Web Services (AWS) has outlined how it is powering its Australian data centre operations, arguing that its infrastructure investments are contributing to grid stability and renewable energy generation rather than placing additional burden on the country’s electricity system.
The company, which has operated data centres in Australia since 2012, has framed its approach around five areas: energy-efficient infrastructure design, renewable energy procurement, battery storage investments, self-funded grid connections and the impact of data centre demand on household electricity prices.
The detail comes as Australia pursues its ambition to become a regional digital hub under the National AI Plan, and amid ongoing public debate about the energy demands of data centre expansion.
Data centres currently account for about 3 per cent of Australia’s total electricity consumption, according to AWS, which is significantly less than mining or manufacturing. Federal Energy Minister, Chris Bowen, has previously stated that data centres can help deliver the country’s 82 per cent renewable energy target.
Custom chips and network redesign
AWS pointed to its custom-designed silicon as a key element of its efficiency strategy. The company’s latest generation of custom chips uses roughly a quarter less power for equivalent workloads compared to traditional processors. For AI training workloads specifically, AWS claims the efficiency gains are larger, reducing energy use by up to 75 per cent. Companies including Anthropic, OpenAI, Uber and Pinterest run workloads on these chips.
On the networking side, AWS has redesigned how its data centres are wired internally, reducing networking hardware by 69 per cent while increasing speed by 33 per cent. The company argues that using less equipment translates directly to lower power draw and reduced energy waste in moving data.
AWS claims its infrastructure is up to 4.1 times more energy-efficient than on-premises data centres, citing a study from Accenture. The company’s position is that cloud computing consolidates workloads onto shared infrastructure running at higher utilisation rates, rather than thousands of organisations each running their own partially utilised servers.
The company reported a global average power usage effectiveness (PUE) of 1.14 in 2025, an improvement from 1.15 in 2024. AWS argues this compares favourably to a public cloud industry average of 1.25 and an on-premises enterprise data centre average of 1.63, as estimated by the International Data Corporation.
On water efficiency, AWS reported a global data centre water usage effectiveness (WUE) of 0.12 litres per kilowatt-hour of IT load in 2025, which it claims is more than seven times more efficient than the industry average.
$2.8 billion in Australian renewable energy since 2020
AWS highlighted its investments in carbon-free energy to power its Australian operations. Since 2020, Amazon has invested an estimated $2.8 billion in renewable energy projects across Australia.
In April 2026, Amazon signed nine new power purchase agreements (PPAs) adding 430 megawatts of carbon-free energy to the grid. Eight of the nine incorporated battery energy storage systems (BESS), including Amazon’s first solar-battery hybrid projects in Australia and its first outside the United States.
The company has since signed a second agreement for the Winton North solar-plus-storage project in northeast Victoria, a 130 MW solar farm paired with a 70 MW battery on a single 256-hectare site. Amazon is purchasing 70 MW of both the solar power and the battery storage from the same site, an arrangement that only a handful of companies have entered into in Australia.
Once operational, Amazon’s 20 renewable energy projects in Australia are expected to provide close to 1 GW of new renewable capacity, which the company estimates would be enough to power the equivalent of more than half a million households annually.
According to BloombergNEF, Amazon was the largest corporate purchaser of carbon-free energy in Australia in 2025. Globally, 100 per cent of electricity consumed by Amazon was matched with renewable energy sources in 2025, the third consecutive year the company has reached that mark.
Battery storage investments target grid stability
AWS has been investing in battery energy storage systems across Australia, with a particular focus on Victoria. The company has signed an agreement for the Bairnsdale BESS, a 50 MW standalone battery in East Gippsland, Victoria.
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Unlike batteries paired with solar or wind farms, the Bairnsdale battery connects directly to the national grid, allowing it to supply electricity when demand requires it. AWS argues this aligns with the Australian Energy Market Operator’s (AEMO) strategic vision for Australia’s grid, centred on renewables backed by storage.
The operational logic is straightforward. When solar and wind generation produces more electricity than the grid needs, typically during the middle of the day, batteries store the surplus. When evening demand rises and renewable generation drops off, the batteries release stored energy back into the grid, smoothing price spikes and preventing surplus renewable energy from going to waste.
AWS noted that in 2025, an estimated 7.2 terawatt-hours of surplus wind and solar energy was generated in Australia. The company characterised that volume as approximately enough electricity to power every home in New South Wales through the evening peak for an entire year.
Amazon has invested in seven BESS projects in Victoria to date, bringing its total across Australia to 10 projects with a combined capacity of 368 MW once completed. The company estimates this is equivalent to the power needed for more than 125,000 homes through the evening peak.
The Bairnsdale BESS represents Amazon’s first standalone battery storage agreement globally and makes it the first non-energy company to offtake a standalone battery in Australia, according to the company.
Self-funded grid connections
AWS addressed concerns about data centre infrastructure placing strain on local power networks by outlining how it funds its own grid connections.
When AWS builds a data centre, it invests in a dedicated high-voltage electricity connection that is separate from the lower-voltage lines delivering power to homes and businesses. The company plans these connections in coordination with the local electricity provider and pays for the required infrastructure, including substations.
AWS stated that its data centres connect at a voltage level that avoids placing additional load on the local infrastructure that communities depend on.
In many cases, the infrastructure AWS funds is built with capacity beyond the company’s immediate requirements, because that is how the electricity system is designed to grow efficiently. Where this occurs, the spare capacity becomes available to support future growth in the broader community.
Impact on household electricity bills
AWS also addressed the question of whether data centre expansion is driving up household electricity costs, citing an independent study from Frontier Economics.
The study found that Australia’s market and regulatory frameworks are designed so that data centres pay prices reflecting the actual costs they create, preventing those costs from being passed on to households.
At the local network level, if standard charges do not cover the infrastructure a data centre needs, the operator pays upfront, preventing costs being shifted to residential customers. At the transmission level, data centres cover the full cost of any infrastructure built for their connection, plus a larger share of network charges because they consume more power at peak times.
AWS pointed to a finding from the Australian Energy Regulator that electricity charges for a typical residential customer on the Jemena network in Victoria would drop by an average of $38 a year compared to 2025-26 pricing. The regulator attributed this in part to growing demand from data centres, major new connections and home electrification, all of which spread network costs across more users.
AWS characterised this as evidence that data centre demand produces system-wide benefits that support rather than increase what Australian households pay for electricity.
Broader sustainability commitments
Beyond its Australian operations, AWS reported progress on reducing the embodied carbon associated with building data centres and manufacturing hardware. In 2025, the company constructed 39 data centres with lower-carbon concrete and 33 data centres with lower-carbon steel.
AWS also highlighted its circular economy practices, noting that its re:Cycle Reverse Logistics program has enabled the company to source retired components for reuse or resale since 2020. Amazon estimates the program has prevented 225,000 metric tons of CO2 equivalent emissions.
The company has committed to being water positive by 2030, aiming to return more water to communities than its operations consume. AWS expects to return more than 22 billion litres of water to local communities each year through its water replenishment efforts.
Last Updated on September 1, 2026 by Nick Ross
