Epic Energy has officially commenced commercial operations at its 100MW / 200MWh Mannum Battery Energy Storage System (BESS) in South Australia. The milestone marks the completion of a major clean energy infrastructure project aimed at strengthening grid reliability and supporting the state’s renewable energy transition.
Ownership
The Mannum BESS was acquired by Epic Energy from Recurrent Energy, a subsidiary of Canadian Solar, in January 2024. The AU$130 million (US$85 million) project reached full operational status on 10 October 2025, following a commissioning process that began in May after registration with the Australian Energy Market Operator (AEMO). The acquisition included an agreement for Canadian Solar’s e-STORAGE division to supply and deliver its SolBank battery solution for the site.
Location
Located 60 kilometres east of Adelaide, the facility sits within Epic Energy’s Mannum Energy Park, which also houses two existing solar PV power plants—the 7MW Mannum Stage One and the 39MW Mannum Stage Two solar farms. Together, these assets integrate renewable energy generation with large-scale storage and a dedicated substation, enhancing energy dispatch and grid stability.
Capacity
With a capacity of 100MW and 200MWh of storage, the Mannum BESS can provide up to two hours of discharge to the National Electricity Market (NEM), which spans Australia’s eastern and southern states. Though this is nowhere near the capacity of one of Australia’s largest BESS the Tomago Battery Energy Storage System (BESS) project currently under development near Newcastle in New South Wales, it will none the less deliver enough energy to power approximately 16,000 South Australian homes each day. The project was delivered by e-STORAGE and Adelaide-based Consolidated Power Projects (CPP), with Epic Energy overseeing construction and retaining ownership and operation.
Epic Energy has partnered with UK-based optimisation specialist Habitat Energy to manage the battery’s commercial operations. Habitat Energy uses advanced algorithmic trading strategies to maximise revenue from electricity market participation while simultaneously providing grid stability services.
Epic Energy CEO Clive D’Cruz emphasised that the Mannum BESS will play a vital role in supporting grid stability and reliability during Australia’s energy transition. The system is designed to manage variability in renewable generation by storing excess solar power and supplying it during peak demand periods, helping to deliver a cleaner and more resilient electricity network for South Australians.
Project Factsheet
Project Name: Mannum Battery Energy Storage System (BESS)
Location: Mannum, South Australia
Developer / Owner: Epic Energy
Technology Provider: e-STORAGE (Canadian Solar)
Construction Partner: Consolidated Power Projects (CPP)
Commercial Operations Partner: Habitat Energy (UK)
Nameplate Capacity: 100MW / 200MWh
Estimated Cost: AU$130 million (US$85 million)
Commissioned: October 2025
Homes Powered: Approximately 16,000 per day
Integration: Part of Mannum Energy Park (includes 7MW and 39MW solar farms)
Market: National Electricity Market (NEM)
