NHOA Energy Wins Culcairn Battery Project to Advance Australia’s Grid-Scale Energy Storage
NHOA Energy, a global provider of utility-scale battery energy storage systems (BESS), has been awarded the notice-to-proceed by Neoen for the development of the Culcairn Battery project in New South Wales (NSW), Australia. The project, rated at 215 MW / 963 MWh, represents another significant milestone in the long-standing collaboration between the two companies and highlights the growing importance of large-scale energy storage in supporting Australia’s renewable energy transition.
The award strengthens NHOA Energy’s position as one of the leading providers of utility-scale energy storage infrastructure while reinforcing Neoen’s commitment to expanding renewable generation and flexible grid solutions across Australia. As renewable energy penetration continues to rise throughout the National Electricity Market (NEM), battery storage projects such as Culcairn are becoming essential for maintaining system reliability, improving renewable integration, and enhancing electricity market efficiency.
The Culcairn Battery will be delivered under an Engineering, Procurement and Construction (EPC) contract through a partnership involving NHOA Energy and a joint venture between Equans Solar & Storage and Bouygues Construction Australia. The collaboration brings together expertise in battery storage technology, engineering, and infrastructure delivery to ensure the successful execution of one of New South Wales’ most significant hybrid renewable energy projects.
The latest contract follows the successful completion of another major collaboration between Neoen and NHOA Energy—the 238.5 MW / 477 MWh Blyth Battery project in South Australia. Since entering commercial operation in early 2025, the Blyth Battery has demonstrated the value of large-scale battery storage in supporting renewable integration and grid reliability. Building on that success, the Culcairn Battery further expands the strategic relationship between the two companies and underscores their shared commitment to accelerating Australia’s clean energy transformation.
Once operational, the Culcairn Battery will become a landmark hybrid energy project by integrating a large-scale battery energy storage system directly with Neoen’s existing 440 MWp Culcairn Solar Farm. Unlike standalone battery installations, the project will feature an AC-coupled battery system connected behind the meter, enabling the storage facility to work seamlessly alongside the solar farm.
This behind-the-meter configuration allows electricity generated by the solar facility to be stored during periods of excess production and dispatched when electricity demand increases or renewable generation declines. Such an arrangement significantly improves the utilization of renewable energy while increasing the commercial value of the solar asset through greater operational flexibility.
Hybrid renewable projects combining solar generation and battery storage are becoming increasingly important worldwide as electricity systems transition toward cleaner energy sources. By storing excess solar generation and delivering electricity during evening demand peaks or periods of reduced sunshine, hybrid facilities improve grid stability while reducing renewable energy curtailment.
For NHOA Energy, hybrid systems represent one of the company’s core technological strengths. Over recent years, the company has developed extensive expertise integrating battery energy storage with renewable generation assets as well as conventional power infrastructure across multiple international markets. The Culcairn Battery adds another flagship project to its growing global portfolio of hybrid energy solutions.
Australia continues to lead global investment in utility-scale battery storage, driven by the rapid expansion of renewable energy generation and the retirement of aging coal-fired power stations. Battery storage has emerged as one of the most effective technologies for balancing intermittent renewable generation while providing essential grid services such as frequency control, reserve capacity, and fast-response energy delivery.
The Culcairn Battery has been specifically designed to support Australia’s evolving electricity system. By integrating directly with the existing solar farm, the project will improve renewable energy utilization while contributing to the stability and resilience of the National Electricity Market.
Large-scale batteries are capable of responding within milliseconds to fluctuations in electricity supply and demand, making them invaluable assets for modern power systems with increasing shares of wind and solar generation. Their ability to rapidly inject or absorb electricity helps maintain system frequency and reduces the likelihood of network disturbances.
In addition to providing operational flexibility, battery storage projects also contribute to reducing wholesale electricity price volatility by storing lower-cost renewable energy during periods of abundant generation and supplying electricity during peak demand when prices are typically higher.
The Culcairn Battery therefore represents both an important infrastructure investment and a strategic asset capable of delivering commercial, operational, and environmental benefits throughout its lifetime.
Jean-Christophe Cheylus, CEO of Neoen Australia-Pacific, welcomed the commencement of construction and emphasized the strategic importance of the project for both Neoen and Australia’s clean energy transition.
He noted that the Culcairn Battery represents Neoen’s first behind-the-meter battery project integrated with a solar farm in Australia and marks another significant achievement in the company’s rapidly expanding renewable energy portfolio.
Cheylus highlighted that the project demonstrates the strong working relationship established between Neoen and NHOA Energy following the successful completion of previous battery storage developments.
He also pointed out that the announcement comes only weeks after Neoen officially inaugurated the Culcairn Solar Farm, illustrating the company’s ability to move quickly from renewable generation development to integrated energy storage deployment.
According to Cheylus, the rapid progression of projects reflects Neoen’s commitment to delivering high-quality renewable energy infrastructure that supports Australia’s transition toward a lower-carbon electricity system while strengthening grid stability across New South Wales.
Adrian Marziano, Vice President Australia & Pacific at NHOA Energy, said the latest award reflects the confidence Neoen continues to place in the company following years of successful collaboration and project delivery.
He described repeat project awards from one of the world’s leading renewable energy developers as a strong endorsement of NHOA Energy’s engineering expertise, execution capabilities, and ability to consistently deliver complex utility-scale energy infrastructure.
Marziano also emphasized the importance of the Culcairn Battery as a flagship hybrid energy project that will maximize the value of one of New South Wales’ major renewable energy resources.
He noted that the project showcases NHOA Energy’s expertise in integrating advanced battery storage technologies with renewable generation assets to create more flexible and efficient energy systems capable of supporting the future needs of Australia’s electricity network.
The project also highlights the increasing importance of strategic partnerships in accelerating renewable energy deployment. By combining Neoen’s experience in renewable generation with NHOA Energy’s expertise in battery storage technology and the construction capabilities of Equans Solar & Storage and Bouygues Construction Australia, the development brings together complementary strengths required to deliver large-scale infrastructure efficiently.
As Australia continues to expand renewable generation capacity, integrated solar-plus-storage projects are expected to become a cornerstone of future electricity infrastructure. Hybrid facilities enable renewable energy developers to maximize asset utilization, improve energy dispatch flexibility, and provide valuable grid support services that enhance overall system reliability.
For NHOA Energy, the Culcairn Battery further strengthens its growing presence in Australia, one of the world’s fastest-growing markets for utility-scale battery storage. The project also reinforces the company’s global strategy of supporting utilities, renewable developers, and grid operators with advanced energy storage solutions that enable higher renewable penetration while maintaining reliable electricity supply.
With construction now set to begin, the 215 MW / 963 MWh Culcairn Battery is expected to become a flagship example of integrated renewable energy infrastructure, demonstrating how large-scale battery storage can unlock greater value from solar generation while helping Australia’s National Electricity Market continue its transition toward a cleaner, more resilient, and increasingly flexible energy future.
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