Wilson Transformer Company to supply replacement transformer for Waratah Super Battery

By Global Infrastructure Sherpa · Feb 26, 2026

Supply Agreement Battery Storage announced Australia Feb 26, 2026

850 MW

Capacity

operating

Stage

Waratah Super Battery

Project

Wilson Transformer Company (WTC) has started production of a replacement HVT3 transformer for deployment at the 850 MW / 1,680 MWh Waratah Super Battery (WSB). The delivery of the transformer to WSB is scheduled for Q3 2026.

Deal Analysis

Wilson Transformer Company (WTC) has secured a supply agreement to provide a replacement HVT3 transformer for Akaysha Energy's Waratah Super Battery (WSB) project, a significant grid-scale battery storage asset in Australia. The delivery of the transformer is scheduled for Q3 2026. While the financial terms of the agreement remain undisclosed, the deal underscores the ongoing investment and maintenance required for large-scale battery storage infrastructure. The replacement transformer is crucial for ensuring the continued operation and reliability of the 850 MW / 1,680 MWh WSB. This agreement highlights the growing importance of battery storage in supporting grid stability and renewable energy integration. Akaysha Energy's focus on developing and operating such solutions positions them as a key player in the Australian energy market. WTC's selection as the supplier further demonstrates their expertise in providing critical components for large-scale energy infrastructure projects. The deal also suggests a proactive approach to maintaining the WSB, ensuring its long-term operational effectiveness.

Wilson Transformer Company will supply a replacement transformer for the Waratah Super Battery.
The Waratah Super Battery has a capacity of 850 MW / 1,680 MWh.
Akaysha Energy is the developer of the Waratah Super Battery.
Delivery of the transformer is scheduled for Q3 2026.

Market Context: The deal takes place within the growing Australian battery storage market, which is increasingly important for supporting renewable energy integration and grid stability.

Source Intelligence

KEY DETAILS

The HVT3 transformer experienced a significant internal fault in October 2025: "The HVT3 transformer experienced a significant internal fault in October 2025, resulting in damage to the windings and an overpressure event, Akaysha said." Delivery of the transformer to WSB is scheduled for Q3 2026: "delivery of the transformer to WSB is scheduled for Q3 2026." The WSB continues to operate with one transformer in service, currently meeting half of its System Integrity Protection Scheme (SIPS) obligations at 350 MW: "The WSB continues to operate with one transformer in service, currently meeting half of its System Integrity Protection Scheme (SIPS) obligations at 350 MW." The remaining capacity of the 850 MW battery is scheduled to come online by the end of 2026: "The remaining capacity of the 850 MW battery is scheduled to come online by the end of 2026."

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Capacity

850 MW / 1,680 MWh Waratah Super Battery (WSB)

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Location

Located approximately 100 kilometres north of Sydney, on the former Munmorah coal-fired power station site, delivery of the transformer to WSB is scheduled for Q3 2026.

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Announcement

February 26, 2026

PARTIES MENTIONED IN SOURCE

Wilson Transformer Company seller

"Victoria-headquartered transformer manufacturer Wilson Transformer Company (WTC) has started production of a replacement HVT3 transformer for deployment at the 850 MW / 1,680 MWh Waratah Super Battery (WSB)."

Akaysha Energy developer

"A statement from the Melbourne-based developer of WSB Akaysha Energy also said a second HVT2 transformer remains offline, “with its remediation incorporated into a defined program of work to ensure all three transformers will be operational at the site later in 2026”."

high quality Enriched Feb 26, 2026