Why did Revera Energy cancel its 500 MW solar farm in South Australia?

Revera Energy cancelled the project because it assessed that large-scale solar farms are "not currently economically viable" in South Australia, due to the state's high penetration of rooftop and grid-scale solar which often drives daytime electricity prices to zero.

What is being built instead of the Robertstown solar farm?

Instead of the solar farm, Revera Energy plans to build a large standalone battery energy storage system (BESS) with a capacity of 500 MW and 2,000 MWh, capable of storing and dispatching power for four hours.

Is there a growing market for big batteries in Australia in 2026?

Yes, the market is growing rapidly. Recent developments include the start of construction on a 905 MWh Tesla Megapack project in WA, the acquisition of a 960 MWh battery in SA, and warnings from NSW that it faces a major investment shortfall for the energy storage it needs by 2030.

Why Are Giant Solar Farms Being Scrapped for Batteries in 2026?

A Landmark Shift in Australia’s Energy Landscape

In a move signalling a pivotal shift in Australia’s renewable energy economy, a global investment giant has scrapped plans for a massive 500-megawatt (MW) solar farm in South Australia, declaring it is no longer economically viable. Instead, it will pursue a supersized standalone battery project at the same location, effectively betting that storing energy is now more valuable than generating it in the state’s solar-saturated market.

The decision comes from Revera Energy, an affiliate of the global funds management behemoth Carlyle Group. The company has withdrawn its proposal for the Robertstown solar farm, located near the new Project EnergyConnect transmission link with New South Wales. In its place, Revera now intends to build a significantly larger 500 MW / 2,000 megawatt-hour (MWh) battery energy storage system (BESS).

The Economics of Solar Saturation

In a frank admission submitted to the federal government, Revera stated that large-scale solar farms are “not currently assessed as economically viable in South Australia”. This declaration highlights a crucial turning point for the nation’s most advanced renewable state.

South Australia already boasts a world-leading penetration of rooftop solar, which frequently covers 100% of the state’s daytime electricity demand. With an average of 75% of its energy coming from wind and solar, the wholesale value of electricity generated in the middle of sunny days can often plummet to zero or even negative prices. This market reality drastically undermines the business case for building new, large-scale solar generation facilities.

“No further development to the (up to) 500 MW photovoltaic solar farm is therefore underway. Revera will continue to monitor key valuation parameters, with a view to reassess developing the… solar farm stage if material improvements arise.” - Revera Energy submission.

This isn’t an isolated strategy for the company. At its Bungama facility near Port Pirie, Revera is also prioritising the construction of a 150 MW, 300 MWh battery while holding back on an associated solar farm.

Grid-Scale Batteries Take Centre Stage

The pivot to battery storage reflects the urgent need for technologies that can absorb cheap renewable energy during the day and dispatch it during evening peak demand periods when power is most valuable. The proposed Robertstown BESS, with its four-hour storage duration (500 MW of power for four hours), is designed specifically to profit from this price volatility, a strategy that is becoming central to grid stability.

This strategic shift is not happening in a vacuum. Across the country, the race to build grid-scale storage is intensifying. Just last week, the CEO of New South Wales’ Energy Security Corporation, Paul Peters, issued a stark warning that 75% of the 56 gigawatt-hours (GWh) of storage the state needs by 2030 has not yet secured investment. This highlights a massive investment gap and opportunity in energy storage.

In other recent developments:

Western Australia: Construction officially began in early April on Neoen’s 164 MW / 905 MWh Muchea Battery, which will utilise 252 Tesla Megapack 2XL units and represents Neoen’s first long-duration (six-hour) battery project globally.
South Australia: On April 13, Australian infrastructure manager Palisade Investment Partners announced it was acquiring the 240 MW / 960 MWh Summerfield BESS project currently under construction.
New South Wales: The state’s planning commission recently approved Foresight Group’s 75 MW/150 MWh Hume North battery near Albury.

A New Chapter for Australian Energy

The decision by a major global investor to choose a big battery over a big solar farm is more than a single project update; it’s a powerful market signal. It confirms that in Australia’s most advanced renewable grids, the era of prioritising generation at any cost is over. The future belongs to flexible, dispatchable assets that can provide stability and reliability.

As Australia navigates the transition away from fossil fuels, the focus is now squarely on the enabling technology of storage. The Robertstown project will be a critical case study, demonstrating how standalone batteries are becoming the primary investment vehicle to support a grid dominated by renewables.

A Landmark Shift in Australia’s Energy Landscape

The Economics of Solar Saturation

Grid-Scale Batteries Take Centre Stage

A New Chapter for Australian Energy

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