Corporate and Institutional

September 1, 2026

Australia’s clean energy transition has moved decisively in 2026 from policy ambition to delivery rollout and challenge, with a vast investment task concentrated over the coming years. 

The 2026 Integrated System Plan (ISP) confirms that renewable energy, connected through transmission and distribution, firmed with storage and backed by flexible dispatchable generation, remains the least-cost pathway to deliver reliable and secure electricity for the National Electricity Market (NEM) as coal-fired generation retires and electricity demand grows.  

In addition, at the household level, consumers are continuing to adopt rooftop solar and batteries to support the energy transition. 

For lenders, this is a familiar but increasingly urgent proposition: the transition is highly dependent on bankable revenue models, grid access, planning approvals, supply chain constraints, cost escalation and community confidence. 

The scale of the opportunity is significant. When talking to our private capital and strategic investor customers, we are consistently told that the clean energy sector is a key investment focus, across new generation and storage opportunities as well as new transmission in support of renewable energy zones. 

The Australian Energy Market Operator’s (AEMO) optimal development path projects utility-scale wind and solar capacity increasing from around 23 GW today to 61 GW by 2030 and 117 GW by 2050.¹ In addition, the NEM will require substantial firming capacity, including around 35 GW of shallow and medium storage, 5 GW of new deep storage and 17 GW of flexible gas-powered generation by 2050.²  

This presents a huge scale of investment opportunity for both debt and equity investors over the coming years as Australia decarbonises its electricity market. 

Structural demand 

This build-out is being driven by structural forces that are unlikely to reverse. Most of the NEM’s remaining coal fleet is approaching retirement age and the demand dynamic in the NEM is changing with the emergence of digital infrastructure and electrification. 

AEMO forecasts underlying NEM electricity consumption to almost double from around 205 TWh today to about 390 TWh by 2050, driven by population growth, electrification of transport and industry and data centres.³

The rise of data centres illustrates the point at hand. The ISP assumes that data centres could reach almost 10% of the NEM’s underlying demand by 2050, which is equivalent to around 20% of today’s total demand.⁴  The most recent Electricity Statement of Opportunities puts this figure at 13% of operational demand over the next decade.⁵

For clean energy investors and financiers, this demand story is highly relevant. Australia is not simply replacing the existing generation fleet with lower-emissions assets; it is building a larger, more complex electricity system to support the economy it wants to become. This gives confidence to investors as the NEM is now seeing increasing demand after a decade of consistent decline.

The investment task is concentrated over the next decade. AEMO estimates that approximately 38 GW of new grid-scale solar and wind is required by 2030.⁶ 

Around 20 GW of solar projects is required (with 19 GW of solar projects having applied for connection), and half of the 18 GW of required new wind is presently in the pipeline.⁷ 

Managing risk

This represents a substantial investment opportunity for equity and debt investors but will require concerted effort to overcome the delivery challenges that the industry faces. 

The delivery risks are material but not insurmountable. When we speak to many of our renewable customers, planning and environmental approvals have become a recurring bottleneck for large greenfield developments. This reflects the increase in size and greater complexity of projects. 

Where projects were once 100-200 MW in size, many of the upcoming projects are likely to exceed 1 GW in capacity, requiring developers to think about how they bring such projects to market in an efficient manner.

Supply chain constraints and labour availability have further added pressure, particularly for wind projects, where civil works and balance-of-plant delivery compete with other infrastructure projects. 

Further, how the clean energy industry engages with the communities that will ultimately host these projects will be key. 

The issue of trust and ensuring communities receive meaningful benefits over the longer term will dictate the success and pace of project delivery. To address the trust challenge, the Clean Energy Council has recently floated an innovative renewable resources payment scheme - which would legislate payments to the host local council - to replace the patchwork of benefit funds currently in place.⁸ 

Whichever way the industry goes, it is imperative that the host communities also receive the benefits of the energy transition.

On the network side, transmission remains a decisive enabler for the NEM but is not without its own social licence challenges: community acceptance and land access are increasingly influencing project timelines. 

The 2026 ISP projects around 6000km of new transmission by 2050 - a 14% extension of the current 44,000km network. About 3500km is already committed or anticipated, while 12 actionable projects would add a further 1660km by 2038.⁹ 

From a financing perspective, transmission is not merely a regulated infrastructure category, it is a key mitigant to generation congestion, curtailment risk and regional reliability constraints. 

Policy focus

In addition to the above development challenges, the policy design is integral for projects to reach final investment decisions. The need for cornerstone long-term offtake arrangements is a key focus for many of our sponsors. 

We see many of our customers with interests across various jurisdictions and it is critical to recognise that Australian projects are competing in a global market.  In such a competitive landscape, getting the policy and market design right is paramount to continue to attract capital to our market. 

The 2025 Nelson Review (officially, the National Electricity Market Wholesale Market Settings Review) identified the “tenor gap” - the mismatch between the shorter power purchase tenors presently available in the market and the longer asset life of these projects - as a key issue and proposed the “Electricity Services Entry Mechanism” to address the longer-term contracting required for new generation projects. 

Indeed, the lack of long-term power purchase agreements (particularly in respect of new wind) is the most pressing constraint for many greenfield developers. 

To attract the most efficient levelised-cost-of-energy for projects (and thus the lowest cost to energy consumers), developers require long-term contracted revenues. As such, a well-developed market mechanism can reduce funding costs, lower the cost of capital and support a deeper pool of investable projects.

Funding support

For lenders, the new wave of development will place a spotlight on several key risks. Revenue tenor must be sufficient to support the expected leverage. Connection risk must be assessed not only as a technical milestone, but also for its implications for curtailment. 

Construction risk must be assessed against tightening supply chains and contractor capacity. And the cost of capital will increasingly reflect the quality of project location, level of offtake, technology and sponsor capability. 

With all these complexities, the bank market will likely remain the most reliable and material source of capital for Australia’s renewable energy build-out.

Banks continue to view renewable generation, storage, transmission infrastructure and enabling technologies as attractive long-term sectors, particularly where projects have strong sponsors, credible construction plans, robust offtake arrangements and resilient contracting structures.

Given the scale of investment required, bank balance sheets alone will not be sufficient and, in the medium to long term, we see alternative debt markets being an important source of funding for the energy transition. Indeed, NAB has successfully introduced Asian term loan investors and US private placement investors to Australian renewable borrowers.

Notwithstanding the challenges and the scale of the task at hand, we believe that the clean energy industry is up for the task. Through innovation, resilience and perseverance, it has overcome numerous challenges over the last decade.

As a leading bank to the renewable energy sector,¹⁰ NAB has played an important part in supporting our customers on that decarbonisation journey and we look forward to supporting our customers through the next phase of the energy transition. 

 

• Jacqueline Fox is NAB Executive, Specialised Finance, Sustainability & Innovation

 

• Ally Bonakdar is NAB Global Head, Infrastructure, Energy & Utilities

 

                                                                                                                                                                         

¹ AEMO, 2026 Integrated System Plan, ‘A Roadmap for the Energy Transition’, 25 June 2026, 15. 

² Ibid, 16. 

³ Ibid, 43. 

⁴ Ibid, 44 and 128. 

⁵ 2026 Electricity Statement of Opportunities for the National Electricity Market, ‘A 10 year outlook of investment requirements to maintain reliability in the NEM, 25 August 2026, 6. 

⁶ Ibid, 79. 

⁷ Ibid. 

⁸ Clean Energy Council, News & Resources (28 July 2026), Clean Energy Council calls for renewable resources payment to put regional communities first | Clean Energy Council. 

⁹ Above n 1 at 99. 

¹⁰ Cumulatively since 2010, NAB is Australia’s leading bank for project finance to the global renewable energy sector (ranking based on IJGlobal League Table MLA, Renewables, data on a cumulative basis from 1 January 2010 to 30 September 2025); see NAB Climate Report 2025 at 8. 

 

 

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