“Playing catch-up:” Sunshot targets cheaper construction in quest for ultra-low cost solar

Arena has launched the third round of Solar Sunshot, a $250 million government funding scheme focused on construction and operational technologies for utility-scale solar farms. The program targets racking systems, robotics, automation, and prefabrication tools that can lower the cost and speed of building large solar installations. This follows Arena's 2023 "30-30-30" target: 30 per cent module efficiency and 30 cents per watt module cost by 2030, intended to drive the levelised cost of solar electricity below $20/MWh. Arena acknowledges that while panel and cell costs have fallen, construction costs remain a barrier to deeper cost reduction across the broader solar supply chain.

Where this fits

This move addresses a real problem that the renewable energy cost story has underplayed: the system-level expense of building and operating solar farms at scale. Panels themselves are now cheap per watt, but installation, racking, tracking, land preparation, grid connection and balance-of-system costs remain substantial. Sunshot's pivot toward construction efficiency is tacit admission that the cheapest part of solar deployment has already been squeezed. The initiative also signals an intent to build Australian manufacturing capability in support systems and compete globally. This bears on sovereignty and supply-chain resilience, since Australia currently depends on imported equipment and inverters that China dominates.

What it means

Australia is betting on construction innovation to drive solar costs lower without building the firm, dispatchable generation that a grid running on weather-dependent power requires. Cheaper solar farms do not change the reality that firming, via batteries, gas or curtailment, remains the largest hidden cost in a high-renewables system. The real test of affordability is not the cost per megawatt of installed capacity, but the cost per megawatt-hour of reliable electricity delivered. Construction efficiency alone cannot solve that.