Neoen's 2.3GWh Virtual Battery Deals Ignite Australia Storage Revolution
France-headquartered renewable energy developer Neoen has just demonstrated why virtual battery agreements are becoming the most important commercial innovation in Australia's grid storage market. The company's Australian subsidiary signed two new virtual battery contracts for its massive Western Downs Battery project in Queensland, bringing the total number of retail customers at a single battery site to five — a milestone that signals the model has moved from experiment to infrastructure.
What Are Virtual Battery Agreements and Why Do They Matter?
Virtual battery agreements allow energy retailers to access the operational functions of a grid-scale battery without developing, building, or operating one themselves. Under this structure, a retailer virtually charges or discharges a contracted portion of the physical battery at times of its choosing, enabling management of renewable generation intermittency and customer load flexibility needs. Neoen retains ownership and operations of the physical asset while generating additional revenue from remaining capacity through wholesale energy markets, ancillary services, and frequency control.
The model solves a fundamental problem in electricity markets: retailers need storage flexibility to manage their renewable portfolios, but building and operating grid-scale batteries is capital-intensive and outside most retailers' core competencies. Virtual battery agreements bridge this gap by decoupling asset ownership from operational access. Explore our collection of LiFePO4 battery solutions designed for grid-scale and commercial applications.
The Western Downs Battery: A Site Expanding in Scale and Depth
Located 22 kilometers southeast of Chinchilla in Queensland's Western Downs region, the battery sits adjacent to a 460MWp ground-mount solar PV plant that together form Neoen's Western Downs Green Power Hub. Stage 1's 270MW/540MWh system entered the National Electricity Market (NEM) in June 2025, delivering grid reliability and frequency services to Queensland's electricity network. Stage 2 followed in September 2025, energizing six weeks ahead of schedule and taking combined capacity to 540MW/1,080MWh — making it the largest battery storage asset with grid-forming capabilities registered in Queensland.
Stage 3, now under construction, will add a further 305MW/1,220MWh of 4-hour duration storage comprising 312 Tesla Megapack 2XL units. When complete, the total facility will reach 845MW and 2.3GWh, with installation targeted for completion before year-end. The project is being delivered by Tesla and engineering firm UGL alongside local contractors. UGL has established a major footprint in utility-scale battery storage construction in Australia, with 3.6GWh already installed and commissioned across 13 solar PV plants.
Five Retailers, One Battery: The Commercial Blueprint
The two new agreements — with Nectr (backed by South Korea's Hanwha Group) and SmartestEnergy (a UK-headquartered energy management firm) — bring the total number of virtual battery customers at Western Downs to five. AGL Energy, Shell Energy, and Engie each hold existing contracts at the facility. The first virtual battery contract for the site was the 10-year agreement with AGL signed in August 2024, which triggered the final investment decision for Stage 2 and allowed AGL to virtually charge and discharge up to 200MW/400MWh of storage.
Under the new arrangements, Stages 2 and 3 will deliver up to 2-hour and 4-hour capacity services respectively to Nectr, while Stage 3 will provide 4-hour capacity services to SmartestEnergy. Both arrangements complement existing renewable energy offtakes that each retailer already holds, with Neoen framing the contracts as providing price certainty and supply reliability alongside the retailers' generation portfolios.
From Novelty to Repeatable Model: The Four-Year Journey
Neoen noted it has now been four years since it first brought the virtual battery product to the Australian market. That journey — from a novel commercial structure to a repeatable model deployed at scale across five separate retailers at a single site — represents one of the most significant business model innovations in the global energy storage sector. The evolution demonstrates that when storage operators create flexible access models that lower barriers for market participants, both sides benefit.
For businesses evaluating energy storage investments, the Australian virtual battery market offers a compelling case study. As more retailers seek storage flexibility and more developers seek offtake certainty, the virtual battery model is likely to spread to markets worldwide — from Europe's growing BESS fleet to emerging storage markets in Southeast Asia and North America. Visit our store to discover how AGAIC POWER's energy storage solutions can power your next project.
