The dream of connecting Australia’s vast solar potential with Asia’s growing energy demands through underwater cables seemed like the perfect solution to climate change. However, the story of Sun Cable’s Australian solar-to-Asia supergrid plan failure reveals how even the most promising renewable energy projects can face enormous challenges that threaten their success.
The Big Idea Behind Sun Cable
Australian entrepreneur David Griffin founded Sun Cable in 2018 with the straightforward but audacious goal of constructing massive solar farms in the country’s sunny Northern Territory and using underwater cables to transport the electricity to Singapore. The project attempted to accomplish something that had never been done at such a large scale before, which is why the Australian solar-to-Asia supergrid plan nearly failed.
Staggering numbers backed Sun Cable’s proposition. A 20-gigawatt solar farm, six times larger than the largest solar farm in the world today, was the business’s aim. Additionally, they intended to install batteries that would be thirteen times bigger than the largest battery system in use today. They had to install 4,300 kilometers of undersea cables—more than five times longer than any submarine power cable now in use—to transmit this power to Singapore.
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Why Interconnectors Matter
Special high-voltage cables called interconnectors are used to transport electricity from areas with abundant renewable energy sources to those in need of it. Many of these links are now operational in Europe, enabling nations to purchase and sell clean electricity in accordance with supply and demand.
According to energy specialist Elisabeth Cremona, “you can have cleaner and cheaper power coming from a neighboring system, which the neighboring system also benefits from as well,” if you have an interconnect. Because investors are aware that they may sell their clean electricity to several nations, this opens up financial potential for renewable energy projects.
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The Growing Global Market
The market for underwater power cables demonstrates the growing significance of initiatives like Sun Cable. Research Nester projects the market to grow from over $23.53 billion in 2025 to over $54.19 billion by 2035 with an 8.7% CAGR. With a 38.6% market share, the Asia-Pacific region dominates this industry, indicating a high need for underwater power connections in the area where Sun Cable intends to operate.
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The Money Problem Gets Bigger
The project’s massive financial requirements and rising expenses had a major impact on the Australian solar to Asia supergrid plan’s failure. According to estimates, the Australia-Asia Power Link would cost $23 billion, but others with experience in previous projects cautioned that the actual cost would probably be significantly higher. One of the most costly infrastructure initiatives ever tried in the Asia-Pacific area is this one.
Two of Australia’s largest billionaire investors, Andrew Forrest and Michael Cannon-Brookes, backed the business in 2019. Sun Cable has shown significant progress toward its objectives by mapping over two-thirds of the Indonesian route and finishing marine surveying in Australian waters by the end of 2022. The goal was to supply power to Singapore by 2027 and begin cable production by 2023.
However, as expenses increased and technical difficulties increased, it became more and more difficult to secure finance for such a large undertaking. Unprecedented demand in the submarine cable market resulted in higher costs and longer delivery schedules than Sun Cable had anticipated.
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Comparative Table of Australia’s Major Solar Export Initiatives
| Aspect | Australia-Asia PowerLink (AAPowerLink) | Asian Super Grid (ASG) | Sun Cable’s Original Proposal |
|---|---|---|---|
| Objective | Export solar power from the Northern Territory to Singapore | Create a transnational renewable energy grid across Asia | Export solar power from the Northern Territory to Singapore |
| Solar Capacity | 6 GW | Varies by country | 20 GW |
| Transmission Distance | 4,200 km undersea cable | Varies by regional connections | 4,200 km undersea cable |
| Status | Planning phase; final investment decision expected by 2027 | Conceptual stage; no concrete projects yet | Collapsed in January 2023 due to financial disputes |
| Major Challenges | Financial disputes, environmental concerns, and regulatory hurdles | Political complexities, high infrastructure costs, and policy differences | Investor conflicts, regulatory hurdles, and environmental concerns |
| Economic Impact | Projected A$20 billion for Northern Australia | Potential for regional economic benefits | Not applicable due to project collapse |
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When Politics and Trust Become Problems
One of the biggest lessons from the Australian solar to Asia supergrid plan failure involves the complex political and trust issues that arise when countries become dependent on each other for energy. Countries are naturally cautious about importing large amounts of electricity from other places because it makes them vulnerable if something goes wrong.
The recent decision by Malaysia to prohibit all exports of renewable energy to Singapore in October 2021, citing its own need for sustainable energy sources, taught Singapore a valuable lesson. For Singapore, which intends to use more renewable energy sources and less natural gas, this was a major issue.
The Australian solar to Asia supergrid plan failure can be attributed to the lessons learned from Russia and Europe. In 2021, Russia accounted for nearly half (≈ approximately 45%) of the EU’s natural gas imports, and the Nord Stream pipeline was a major conduit in that supply. Russia shut down the pipeline because of sanctions over the invasion of Ukraine and the sabotage that followed, leaving Europe to find alternative energy sources for the winter.
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The Billionaire Fight That Changed Everything
In January 2023, a serious disagreement between the two billionaire investors on the project’s future path caused the Australian solar to Asia supergrid plan to fail. Andrew Forrest reportedly started to doubt if the submarine cable technique would succeed after growing dissatisfied with the cable project’s progress.
Forrest, who wanted to completely alter the plan, proposed using solar energy to produce green hydrogen and ammonia that could be exported to other nations rather than constructing cables to transmit electricity. Although it’s far less effective than delivering electricity directly, this is another method of transporting renewable energy worldwide without the need for costly cables.
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The Project Collapses But Doesn’t Die
The Australian solar-to-Asia supergrid plan failed at its lowest point in January 2023, when Sun Cable went into administration without the backing of both investors. But this wasn’t the end of the tale, demonstrating the tenacity of certain clean energy initiatives in the face of significant obstacles.
In the end, the Australia-Asia Power Link project was able to proceed when Cannon-Brookes outbid Forrest to acquire full ownership of Sun Cable in late 2023. However, the drama had a negative impact; the current plan calls for power to be delivered in the early 2030s, but initially just to Darwin in northern Australia. After a few years, if at all, the link to Singapore is expected to be established.
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What This Means for Future Energy Projects
The Australian solar to Asia supergrid plan failure and subsequent recovery provide important lessons for other ambitious clean energy projects around the world. The experience shows that while connecting countries with clean energy cables is technically possible and environmentally beneficial, the challenges go far beyond just engineering and money.
Other major interconnector projects are moving forward despite Sun Cable’s difficulties, including the Xlinks Morocco-UK power project with a 3800-kilometer cable and the North Sea Wind Power Hub connecting multiple European countries. These projects suggest that the vision of a global supergrid sharing clean energy around the world remains achievable, even if individual projects face setbacks.
With careful planning, government assistance, and international collaboration, political and technical obstacles can be surmounted, as demonstrated by the success of European interconnectors. Significant international connectivity has already been attained by Europe, enabling the continent to share renewable energy sources and enhance energy security.
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Current Status and Future Outlook
Despite the challenges that led to the Australian solar to Asia supergrid plan failure, the project is now moving forward in a modified form. Sun Cable has received environmental approval from Australia and conditional approval from Singapore, representing significant progress after the 2023 crisis.
The revised project timeline targets the early 2030s for initial operations, with a final investment decision expected in 2027. Sun Cable reports investing $270 million in project development across Australia, Singapore, and Indonesia, showing continued commitment despite the setbacks.
The project’s survival and gradual progress suggest that while the original timeline and scale were overly ambitious, the basic concept of connecting Australia’s solar resources to Asian markets remains viable with proper planning and realistic expectations.
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Frequently Asked Questions ( FAQs)
Q: What is Sun Cable’s project?
A: Sun Cable plans to build the world’s largest solar farm in Australia’s Northern Territory and send clean electricity to Singapore through a 4,300 km underwater cable.
Q: How much power will Singapore get?
A: Singapore approved importing 1.75 GW of solar power, which will meet about 9-10% of the country’s total electricity needs.
Q: When will the project be completed?
A: The project targets electricity delivery in the early 2030s, with a final investment decision expected in 2027.
Q: How much will it cost?
A: The project is estimated to cost around $19-30 billion USD, making it one of the most expensive infrastructure projects in the Asia-Pacific region.
Q: Why did the project almost fail?
A: Two billionaire investors disagreed about strategy – one wanted underwater cables, the other preferred converting solar power to hydrogen. The company went into administration in 2023.
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