Australian government approves AAPowerLink project to export solar to Singapore

Project scope and approvals

• Government approval currently covers only the Australian part: solar farm, inland HVDC to a “head-end,” and subsea cable out to the edge of Australia’s exclusive economic zone.
• The project envisions ~20 GWp of solar, ~36–42 GWh of storage, and a ~2 GW HVDC export link (about 1.75–2 GW to Singapore).
• There is discussion of also supplying Darwin and possibly other domestic loads, but demand near the site is small and remote.

Cable technology and materials

• Very long undersea links are technically feasible; this one (~4,200–4,300 km) would be far longer than existing cables but uses well-understood HVDC tech.
• Aluminum conductors are considered more likely than copper due to cost and availability; rough calculations suggest the metal requirement is a tiny fraction of global production.
• Losses over long HVDC lines are viewed as acceptable given high voltage and cheap solar; AC is rejected for such distances due to capacitive/inductive losses.

Economics and market logic

• Core business case: arbitrage between cheap outback solar and higher-priced Singapore electricity.
• Some argue it may be cheaper for each region to develop its own renewables plus storage (e.g., deserts near Europe, Indonesia’s own solar).
• Others note Singapore’s wealth, limited land, and desire for green supply make it a strong buyer, even if the project isn’t the absolute cheapest option.

Geopolitics and energy security

• Concerns that a 4,000+ km subsea cable is vulnerable in war or sabotage (submarines, dragged anchors).
• Counterpoint: Singapore already depends on imported fuels; if it were in a major conflict, loss of a cable would be just one of many problems.
• Rules reportedly cap any single import source to a fraction of Singapore’s total demand to limit dependency.

Alternative uses and opportunity costs

• Some argue Australia should prioritize cheap domestic power, onshore industry (e.g., aluminum smelting, green steel, data centers), and direct rooftop solar.
• Others see large-scale exports as a strategic “second round” of being an energy superpower, replacing coal exports with “frozen sunlight.”

Technical and implementation risks

• Comparisons to shorter undersea links (e.g., Basslink, Viking Link) raise worries about repair times, cost overruns, and maintenance.
• Skeptics doubt megaproject timelines and financing; proponents note private funding and see it as exactly the kind of bold green infrastructure needed.