Transgrid secures up to 2GW of batteries to strengthen NSW grid

The first batteries are expected online in late 2026.

Transgrid has shortlisted nine battery projects to deliver system strength services across the New South Wales transmission network.

The projects were selected following technical modelling to identify priority locations and required capacity.

Transgrid is now negotiating with developers to secure services from up to 2GW of grid-forming batteries, expected to come online from the second half of 2026.

Executive General Manager Jason Krstanoski said third-party batteries will help stabilise the grid without costly new infrastructure or major upgrades.

“Third-party owned batteries are integral to our system strength plan, because they enable us to accelerate the strengthening of the grid without the cost associated with acquiring new plant or major network upgrades,” he said.

The initial procurement targets batteries that are already operating or in advanced development stages to address emerging system strength gaps whilst maintaining competitive pricing.

Australia’s battery investment boom has supported the plan, with the country now the third-largest global market for large-scale batteries, according to Rystad Energy.

Transgrid is targeting 5GW of system strength services from third-party batteries by 2033 as part of its long-term grid stability strategy.