What Data Centre Growth Means for Australia’s Electricity Grid

While Australia is debating how to power the rapid growth of data centres, the Australian Energy Market Operator (AEMO) has released its 2026 NEM Electricity Statement of Opportunities (ESOO), providing a 10-year outlook on electricity demand, reliability and the infrastructure required to support the National Electricity Market.

The outlook provides an encouraging picture, supported by record levels of new generation and storage, as well as a strong pipeline of future projects. However, delivering this new infrastructure on time and in full will be critical to meeting growing electricity demand and replacing ageing generators.

One of the most significant emerging sources of demand is data centres. AEMO forecasts data centre electricity consumption in the NEM to grow from around 5 TWh in 2025–26 to approximately 34 TWh by 2035–36, nearly a seven-fold increase over the next decade.

More Demand Means More Infrastructure

The growth of data centres is not happening in isolation. Electricity demand is also being reshaped by electrification, industrial growth and other emerging industries.

Supporting this growth will require investment across the electricity supply chain, from generation and storage through to transmission, substations, transformers, switchgear, cable systems and monitoring infrastructure.

AEMO's analysis highlights the importance of coordinating large new electricity loads with timely investment in electricity infrastructure, including resources that can support both energy production and peak supply.

Reliability Remains Critical

For data centres, reliable power is fundamental. AEMO's modelling indicates that stronger-than-expected data centre growth could bring forward the need for additional investment in generation, storage and supporting transmission, particularly in NSW, Victoria and South Australia.

This reinforces an important point: powering the data centre boom isn't just about generating more electricity. The network must also be capable of connecting, transferring, protecting and delivering that power reliably.

What Does This Mean for HV Infrastructure?

As new data centres connect to the grid and existing facilities expand, HV and MV infrastructure will play an increasingly important role.

Underground cable systems, for example, need to be designed to manage the electrical stresses associated with high-power installations. Cable Link Boxes and Sheath Voltage Limiters (SVLs) can form an important part of cable sheath bonding and protection systems.

For a closer look at this topic, read our technical article:

[Powering Next-Generation Data Centres with Cable Link Boxes]

Looking Ahead

AEMO's 2026 outlook presents a clear message: Australia's electricity system is changing rapidly.

Record levels of new generation and storage, together with a strong pipeline of projects, provide an encouraging foundation. But delivering the required infrastructure on time and in full will be critical as electricity demand grows and ageing generation is replaced.

For the data centre industry, the conversation is therefore not only about where the power comes from.

It is also about how that power is connected, managed, protected and delivered reliably.

The data centre boom is creating a new infrastructure challenge, and the electricity network will need to evolve with it.

As data centre demand accelerates, the challenge extends beyond generating enough electricity. The network infrastructure required to connect, transfer, protect and reliably deliver that power will also need to keep pace.

Whether you are planning a new data centre, expanding existing capacity, or upgrading your cable network, contact the Insulect team to discuss the right Cable Link Box solution for your project.