Data centres triple their share of the NEM by 2030, from ~2% to ~6%, with Sydney at 11% of NSW consumption
Data centres triple their share of the National Electricity Market by 2030, from around 2% to around 6%, with Sydney reaching 11% of NSW consumption. Grid connection, the mitigation toolkit, and why power access is now the industry's sorting mechanism.
Data centre electricity consumption, NEM (TWh)
| Item | TWh |
|---|---|
| FY2025 | 3.9 |
| FY2030 | 12 |
| FY2049-50 | 34 |
Data centre electricity consumption, NEM (TWh). Source: Climate Council (Jun 2026); AEMO/Oxford Economics 2025 IASR report; ITK Research (May 2026); de Valence/Substack (Dec 2025); JLL (10 Mar 2026). As at 21 Sep 2026.
- Consumption
- ~3.9-4 TWh in FY2025 to ~12 TWh by FY2030 (25.1% p.a.) and ~34 TWh by FY2049-50
- Share of the NEM
- ~2% to ~6% by FY2030, and ~12% by FY2049-50
- Accelerated-AI case
- Sensitivity runs 40% higher post-2030
- CEFC/Baringa
- Central forecast: 4.7-7.4 GW of DC capacity by 2035, taking DCs to up to 11% of national consumption
Regional concentration is extreme: DC share of state consumption
| Item | NSW metro | Victoria |
|---|---|---|
| Current | 4 | 2 |
| 2030 | 11 | 8 |
| 2050 | 18 | 19 |
The connection reality behind the curves
- Grid connection lead times run 9+ months to years; JLL reports 24-month waits in emerging markets to 8+ years in core markets.
- Only 300 MW of committed supply was available for AirTrunk's 400 MW Eastern Creek project at one point (de Valence).
- Macquarie Park requires multi-site substation upgrades before announced capacity can energise.
- DC electricity use nearly doubled in Victoria and rose ~18% in NSW over 2024-25 (Climate Council citing Wiggins 2026).
The structural read: Australia's data centre question is now an electricity-system question. Every subsequent section (pricing, competition, scenarios) is downstream of who gets power, where, and on what policy terms.
The political economy turned: data centres are now a household power-bill story, and the industry is answering with receipts
The charge: a household power-bill story
The Climate Council (Jun 2026) estimates DC demand could raise wholesale prices up to 26% in NSW and 23% in Victoria by 2035 in a gas-met scenario (wholesale ~ 40% of a residential bill; the renewables-met scenario is materially lower). CommBank flags DC growth as a key upside risk to household electricity prices. That framing (not the technology) is what brought National Cabinet into the room.
Industry's formal response (Data Centres Australia, 8 Sep 2026)
- Operators already pay 100% of connection + upstream transmission costs under the NER.
- A$3.1bn invested in energy infrastructure since 2020, with A$7.2bn committed by 2030.
- Voluntarily offsetting ~70% of energy use via PPAs/LGCs (~1.5 TWh of new renewables).
- Seeks EPA reform to let diesel gensets/BESS provide grid support.
Where this lands
The likely equilibrium: net-generator obligations codified with transition relief for committed projects; cost-recovery rules settled in favour of causers-pay; and a transparency regime (PUE/WUE disclosure) signalled in the May 2026 Ministerial agreement. Operators with renewables pipelines (AirTrunk SLL platform, NEXTDC's 255 MW of PPAs, AWS's dedicated solar) hold compliance optionality others must buy.
Mitigation toolkit: PPAs at scale, PUE leadership, water discipline and behind-the-meter firming
PPAs & green finance
- NEXTDC: 255 MW of PPAs across APAC; net-zero operations commitment.
- AWS: >170 MW of offtake from three new solar farms in Victoria and Queensland inside its A$20bn program.
- AirTrunk: A$16bn sustainability-linked refinancing (Aug 2025, 60 banks), APAC's largest sustainable financing issuer; total financing >A$18bn.
- Stack: A$1.3bn green loan (Jul 2025; Deutsche Bank, MUFG, Natixis, OCBC, SocGen).
- DCI: world-first combined green + sustainability-linked refinancing (Natixis, 2022).
- Operators collectively claim ~70% renewable offset (Data Centres Australia).
PUE & efficiency
- AirTrunk MEL1: PUE 1.15, the lowest reported among Australian hyperscale facilities.
- Modern AU hyperscale designs target 1.2-1.3; legacy enterprise/DC stock often 1.5+.
- No official Australian PUE/WUE series exists; operator self-report only (register item 9).
- Density step-change (40-100+ kW/rack) forces direct-to-chip/immersion cooling; NEXTDC S7 liquid cooling designed to use no drinking water.
Water
- National DC water demand estimated to more than triple from 5.5 GL to ~17 GL within five years (industry estimate; register item 11).
- Sydney Water has received applications for single facilities wanting up to 40 ML/day (~16 Olympic pools daily).
- Firmus Bell Bay: ~10 cooling days/year, ~99% less water than a typical DC.
Behind-the-meter & firming
- Grid constraints push projects to regional sites with on-site gas/solar (Feb 2026).
- Quinbrook Supernode pairs DC with grid-scale storage.
- Keppel Hazelwood: brownfield generator conversion.
- Contact Energy/CDC 250 MW Stratford (NZ) on a retired gas plant site.
- Nuclear remains politically contested federally; no AU DC-nuclear project announced.
Net-generator compliance will rest on firming more than on certificates: BESS + contracted renewables + curtailment-ready load is the emerging standard architecture.
Power access is now the industry's primary sort mechanism, and it prices into land, valuations and policy simultaneously
Where power access shows up in the numbers
- In land. Erskine Park/Kemps Creek sites clear A$1,400-1,800/sqm because they sit on firm transmission; comparable unpowered land trades at a fraction (Section 05).
- In valuations. Goodman's 'power bank', 6.4 GW of owned/secured power sites across 16 cities (30 Jun 2026), is explicitly marketed as the asset; the buildings are secondary.
- In M&A. CDC's contracted 555 MW was deliverable because Marsden Park carries a 720 MW substation; the contract followed the power.
- In policy. NSW large-load access schemes hand ministers a rationing instrument; queue position becomes a regulated asset.
Signals that confirm or break this thesis
- First net-generator legislation exposure draft (targeted early 2027).
- AEMC final technical standards for large inverter-based loads (~Oct 2026).
- AEMO's 2026 IASR request total vs 2025's 44 GW: a falling number signals speculative requests washing out.
- Transgrid/Ausgrid substation commitment announcements at Eastern Creek, Kemps Creek, Macquarie Park.
- Any ministerial prohibition decision under NSW access schemes: the first one resets land values overnight.
inashanu power-adjusted capacity view, NSW
- 11.4 GW NSW's announced pipeline (Climate Council/DC Byte)
- ~3.7 GW SSD-approved/received cohort, underwritten as policy-visible
- 2-2.5 GW Named substation or connection agreement, bankable through 2029
Of NSW's 11.4 GW pipeline, we would underwrite ~3.7 GW (the SSD-approved/received cohort) as policy-visible, and within that, only projects with named substations or connection agreements as bankable, roughly 2-2.5 GW through 2029. Method: Section 05 screens applied to Climate Council/DC Byte and NSW Planning data.
Power as the priced asset
Sources
- Climate Council, as at Jun 2026
- AEMO/Oxford Economics 2025 IASR report
- ITK Research, as at May 2026
- de Valence/Substack, as at Dec 2025
- JLL, as at 10 Mar 2026
- Amjid Ali analysis, as at 21 Jul 2026
- Data Centres Australia, as at 8 Sep 2026
- AEMC, as at 5 Aug 2026
- NEXTDC disclosures
- ASPI Strategist, as at Jun 2026
- PPAs: NEXTDC
- ASPI, as at Jun 2026
- Reuters/Yahoo, as at 25 Aug 2025
- ITK, as at May 2026
- Natixis (Jan 2022). PUE: DataCenterMap, as at 2026
- Troview, as at Jun 2026
- DCD (Sep 2026). Water: Shiny Side Out, as at 15 Jul 2026
- Firmus FAQs (Sep 2025). Firming: Rod Terry/LinkedIn, as at Jul 2026
- Shiny Side Out, as at Jul 2026
- Allens, as at 2025
- NSW Planning Portal
- King & Wood Mallesons, as at 6 Aug 2026
- Goodman FY26, as at 20 Aug 2026
- CDC/NSW SSD, as at Nov 2025
Related
- What are Australia's new data centre energy rules?
- Which Australian cities have the most data centre capacity?
- How much of Australia's announced data centre pipeline will actually be built?
- What are the risks in Australian data centre investment?
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