Australian energy developer Enervest has announced a joint development agreement with Billion Watts, a subsidiary of Taiwan-listed Billion Electric Co. Ltd (3027.TW), to advance a portfolio of ten battery energy storage projects totaling 50 MW and 200 MWh across New South Wales and Victoria.

Deal Structure and Scope

The partnership targets ten strategically located sites connected to distribution networks across both states, with each individual project falling below the five-megawatt threshold.

Under the terms of the joint development agreement, Enervest will lead project origination and development activities, while Billion Watts will provide development capital and strategic support. Development approvals and Offers to Connect for all ten sites are targeted for completion by June 2027.

The agreement supports what Enervest describes as a broader platform targeting more than 150 MW of annual deployment as the company scales its distributed energy strategy.

The company said the portfolio is consistent with its approach of developing storage infrastructure across multiple layers of the electricity system, ranging from utility-scale batteries to distribution-connected projects.

Strategic Rationale for Sub-5 MW Assets

Enervest chief executive Ross Warby said distribution-connected batteries are becoming increasingly important as legacy generation exits the system, pointing to the role such assets play in supporting Distribution Network Service Providers to manage peak demand, alleviate local constraints and strengthen the grid closer to load.

Warby also highlighted the connection pathway advantages of smaller-scale assets. "They support Distribution Network Service Providers in managing peak demand and alleviating local constraints and strengthening the grid closer to load, while offering faster connection pathways than transmission-scale infrastructure," he said.

He described the partnership with Billion Watts as confirmation of the strategic value of Enervest's origination model and said it reflects strong external appetite for the quality of its development pipeline.

Warby added that the agreement enables Enervest to scale its sub-5 MW platform in a disciplined and coordinated way, developing a repeatable and scalable model for distributed storage that delivers certainty and long-term resilience for communities and network operators.

Billion Watts and the Billion Electric Group

Billion Watts is backed by the broader Billion Electric Group, which the announcement describes as bringing integrated capabilities across energy infrastructure, power electronics and system integration. The company is described as a strategic partner that extends beyond pure capital deployment.

Billion Watts Director Elaine Chen said the investment reflects confidence in Enervest's execution capability and positions Billion Watts to accelerate capital deployment into distributed infrastructure.

She said distributed storage represents a scalable and essential component of modern power systems, allowing for rapid deployment without exposure to the delays and risks often associated with new transmission infrastructure.

Chen said Australia presents a highly attractive market for the company, citing strong policy support, transparent pricing signals and increasing demand for flexible capacity.

"With an experienced team on the ground and a proven track record of execution, Billion Watts and Enervest are well-positioned to develop these assets at pace to maintain system reliability and meet the evolving needs of a rapidly transitioning grid," she said.

International Capital Flows Into Australian Distributed Energy

Warby noted that Billion Watts' expansion into the Australian market highlights growing international investor interest in distributed energy assets, particularly those aligned with faster deployment timelines and diversified revenue streams. The announcement frames the deal as marking significant progress in Enervest's expanding portfolio of high-quality sub-5 MW assets.

The partnership is the latest in a series of agreements and transactions announced by Enervest in recent months. The company signed a landmark sale and funding agreement with Energy Vault in March 2025, followed by a long-term commitment announcement on community, workforce and First Nations participation with Energy Vault in June 2025.

In February 2026, Enervest signed a deal with Octopus Australia for the Hanworth battery energy storage system in New South Wales, and in May 2026, the company acquired the Northern Border Battery Energy Storage Project in New South Wales.

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