Australia’s electricity grid is set for a significant capacity and stability boost, with nearly AUD$950 million committed to two of the nation’s largest solar and battery hybrid developments. On May 20, 2026, Edify Energy announced it had reached financial close on the Smoky Creek and Guthrie’s Gap projects in Queensland, while Malaysian conglomerate Gamuda confirmed its Australian unit, DT Infrastructure, had secured the substantial engineering, procurement, and construction (EPC) contracts.
These twin projects represent a combined 720 megawatts (MW) of solar generation capacity and an impressive 2,400 megawatt-hours (MWh) of battery energy storage. Their timely development is critical for integrating more renewable energy into the National Electricity Market (NEM) and enhancing grid resilience as Australia transitions away from ageing coal-fired power stations.
Queensland’s Role in Grid Transformation
The Smoky Creek and Guthrie’s Gap facilities are strategically located in Queensland, a state rapidly expanding its renewable energy footprint. The projects will utilise DC-coupled hybrid configurations integrated with grid-forming inverters. This advanced technical setup is crucial for maintaining power network stability, especially as synchronous thermal generation (like coal plants) increasingly exits the system.
DC-coupling allows for a more efficient flow of direct current from solar modules directly to the battery energy storage system via DC/DC converters, before being converted to alternating current for grid connection. This configuration is designed to optimise the capture of solar energy, minimise losses, and provide essential grid services.
Edify Energy’s Chief Executive Officer, Ben Warne, highlighted the importance of the projects in the broader energy transition. “These are critical projects in the energy transition, generating cost-effective, reliable and dispatchable renewable energy,” Warne stated.
“These are critical projects in the energy transition, generating cost-effective, reliable and dispatchable renewable energy.” – Ben Warne, CEO, Edify Energy
Gamuda’s involvement through its wholly-owned Australian subsidiary, DT Infrastructure, underscores the significant international investment flowing into Australia’s renewable energy sector. The company will not only undertake the construction but also provide maintenance and operations for both assets upon completion.
Addressing Australia’s Energy Demand and Stability Challenges
The Australian Energy Market Operator (AEMO) has consistently emphasised the need for substantial new generation, storage, and transmission infrastructure to meet the nation’s ambitious renewable energy targets and growing electricity demand. Data from AEMO’s Q1 2026 report indicated that electricity demand reached record levels of 25GW, driven partly by warmer conditions and an 18% surge in data centre demand in New South Wales alone.
Large-scale battery storage plays a pivotal role in addressing these challenges by absorbing excess renewable energy during periods of high generation (e.g., midday solar) and discharging it during evening peaks when demand is high and solar generation declines. This load-shifting capability helps to moderate wholesale electricity prices and reduces reliance on more expensive, often gas-fired, peaking plants.
While the total installed battery capacity in the NEM more than doubled in the 12 months leading up to Q1 2026, with 4,445MW of new large-scale battery systems adding 11,219MWh to the grid, the scale of projects like Smoky Creek and Guthrie’s Gap remains crucial.
Projected System Benefits
These projects are expected to create up to 800 jobs during their peak construction phase and contribute significantly to local skills training programs. The completion is anticipated within two and a half years, aiming for full operation by late 2028.
The integration of such substantial battery storage, particularly with grid-forming inverters, provides essential Frequency Control Ancillary Services (FCAS), which are vital for maintaining grid frequency within acceptable limits and preventing disruptions. This technology ensures that as coal generators retire, the grid can still operate securely and reliably.
Consumers stand to benefit from these large-scale investments through enhanced grid stability and potentially more stable electricity prices by mitigating volatility. Understanding how these large-scale projects contribute to managing supply and demand is crucial for all energy users. For residential and business consumers, managing energy use during peak demand periods remains a key strategy to reduce costs. Readers interested in optimising their own energy consumption can find valuable information on strategies like How to Avoid Peak Demand Charges and Slash Your Time-of-Use Electricity Bills in Australia in 2026.
Comparing Australia’s Largest Hybrid Projects
While specific details on all ‘largest’ projects can be fluid, the Smoky Creek and Guthrie’s Gap developments stand out due to their combined solar and storage capacity. Below is a summary of their key specifications:
| Feature | Smoky Creek & Guthrie’s Gap Combined Project |
|---|---|
| Location | Queensland |
| Solar Capacity | 720 MW |
| Battery Storage | 2,400 MWh |
| Investment | ~AUD$950 million |
| Technology | DC-coupled, Grid-forming inverters |
| Expected Completion | Late 2028 |
| Jobs Created | Up to 800 (peak construction) |
This investment highlights the accelerating pace of Australia’s energy transition, with significant capital directed towards robust, hybrid solutions that can deliver both clean power and critical grid support. The ongoing shift is not just about adding renewable generation, but building a smarter, more resilient grid capable of handling the demands of a modern electrified economy. The government’s broader energy policy frameworks and ongoing initiatives aim to provide further Energy Bill Relief in Australia 2026: Understanding the End of Universal Federal Payments and State Support by ensuring a stable and cost-effective energy supply for all Australians.
The Path Ahead
The successful financial close and commencement of construction for projects of this scale signal strong confidence in Australia’s renewable energy future. As more such projects come online, they will progressively de-risk the grid, reduce reliance on fossil fuels, and ultimately contribute to a more sustainable and affordable energy system for all Australians. The focus on advanced technologies like grid-forming inverters ensures that these new assets are not just generators of power but active contributors to system stability, a critical factor for the NEM’s reliability as it evolves.