Construction is anticipated to commence in 2027, subject to obtaining necessary approvals, with an 18-month build period requiring a peak workforce of 150 personnel over approximately five months. The project is designed for a lifespan of at least 30 years of operation, with remote monitoring 24 hours a day, seven days a week.
The project area overlaps partially with the approved HumeLink transmission project, which commenced enabling works in February 2025 and main construction in September 2025.
Around 18 hectares of the Bannaby BESS project area intersects with the HumeLink footprint, where vegetation has already been cleared under separate approvals.
The site comprises predominantly modified agricultural land historically used for grazing, with patches of planted native vegetation forming boundaries between paddocks.
Two native plant community types occur within the project area: Wollondilly-Shoalhaven Slopes Grassy Open Forest and Southern Tableland Box Woodland, across five distinct condition classes totalling approximately 55 hectares. The project area also contains 1.78 hectares of exotic grassland and 7.76 hectares of formed tracks, existing farm buildings, and the existing substation infrastructure.
