EnergyAustralia, Enerven, and NHOA Energy have reached financial close and officially launched construction of the 245 MWh Hallett battery energy storage system (BESS) project near Canowie in South Australia. This marks the project’s transition into delivery phase. The grid-scale system is expected to provide stability services to Australia’s National Electricity Market (NEM) and will begin commissioning in January 2027.

More on the Project Co-located with Hallett Gas-Fired Power Station

The project forms part of Australia’s push to deploy dispatchable clean-energy infrastructure capable of stabilizing grids with high renewable penetration. Backing under the federal Capacity Investment Scheme is also structured to reduce investor risk and accelerates storage deployment.

By colocating the battery energy storage system (BESS) project at the existing Hallett gas-fired power station, developers are also leveraging existing infrastructure. This will minimize transmission build-out, lower land impact, and shorten delivery timelines.

Hallett Battery Energy Storage System (BESS) Stage 1 Project Overview

Location: Near Canowie, South Australia

Owner/Developer: EnergyAustralia

Delivery partner: NHOA Energy

Electrical contractor: Enerven

Capacity: 245 MWh

Power rating: 50 MW

Duration: 5 hours storage

Technology: Grid-forming BESS with advanced control platform

Status: Financial close achieved. Project construction also started

Commissioning date target: January 2027

Technical Scope of Hallett BESS Project in South Australia

The battery will deliver multiple market and system services. These include:

• Frequency control and ancillary services
• Grid stability and support
• Energy arbitrage
• Participation in NEM market services
• Coordinated operation with existing energy generation sites via proprietary control software

Project Factsheet

Energy capacity: 245 MWh guaranteed usable at beginning of life

Power output: 50 MW

Storage duration: 5 hours

Site integration: Co-located with operating gas plant

Policy support: Australian Capacity Investment Scheme

Project phase: Delivery stage following financial close

Hallett Battery Energy Storage System (BESS) Project: Contractors and Stakeholders

• EnergyAustralia as owner, developer, operator
• NHOA Energy as BESS technology supplier and system integrator
• Enerven as electrical infrastructure and balance-of-plant works overseer
• Australian Government for CIS support framework

Outlook on the Project

Hallett BESS is a good template for hybridization of legacy thermal sites with large batteries. This is an approach increasingly being used globally to extend energy generation value while enabling renewables integration. With financial close achieved and government backing secured for Hallett BESS project, execution risk is now largely tied to delivery performance and grid integration milestones rather than financing. Once construction is complete, like at Templers BESS that is now in its final stretch of commissioning, Hallett will serve the good people of Australia with renewable energy as the world looks toward a greener, cleaner future.