The largest solar farm in the South Pacific, powering more than 10,300 homes in Tonga, was installed by Clay Energy, now part of Sunergise.
New Zealand renewable energy company Sunergise has agreed to acquire solar and battery storage business Infratec NZ from WEL Networks for an undisclosed sum.
The acquisition will bring together Sunergise’s portfolio of more than 200 commercial solar installations with Infratec’s expertise in large-scale solar projects and
battery energy storage systems.
The combined business will offer services including project development, engineering, construction, financing, operation and maintenance for commercial, industrial and utility-scale customers across NZ and the Pacific.
Power play
Sunergise chief executive and significant shareholder Paul Makumbe said the companies’ capabilities were complementary and would help meet demand for renewable energy investment at different scales.
“NZ’s and Pacific’s renewable energy transition requires investment at every scale: commercial rooftops and large-scale generation,” Makumbe said.
“Together we can meet that demand.”
Makumbe said WEL Networks had run a targeted sale process, approaching parties that might be interested in acquiring Infratec.
The acquisition would give Sunergise utility-scale project delivery capabilities it did not currently have, allowing it to serve customers across NZ and the Pacific.
Building scale
The deal would be funded through existing cash within the Sunergise Group, Makumbe said. The company was not bringing in new investors as part of the acquisition but was looking to broaden its investor and capital base for its next stage of growth.
The combined business would employ about 100 people across NZ and the Pacific. Makumbe declined to disclose revenue but said the combined business would have significantly higher turnover than Sunergise currently generated.
Sunergise had no immediate plans for further acquisitions, he said, although that could change as market conditions evolved.
No decision had been made on whether Infratec would be rebranded or integrated into Sunergise. Makumbe said Infratec had an established name and customer trust that the group valued, and any rebranding decision would not be rushed.
Infratec has built 194 megawatts of solar photovoltaic capacity and deployed 49 megawatt-hours of battery storage.
Its projects include the Te Herenga o Te Rā solar farm in the Bay of Plenty, New Plymouth Airport Solar and the 30MWp Taiohi solar farm in northern Waikato.
Makumbe said Infratec’s technical expertise and experience working with major infrastructure operators would complement Sunergise’s commercial solar business and established Pacific presence.
The acquisition would also strengthen Sunergise’s regional operations through Fiji-based Clay Energy, which the group acquired from Todd’s Pacific solar operations earlier in 2026.
Sunergise and Infratec have previously worked together on renewable energy projects across Nauru, the Federated States of Micronesia, the Marshall Islands and Palau. From 2020, the companies delivered five renewable energy plants in the region, including a project described by Sunergise as NZ’s first renewable energy project in Micronesia.
The joint project received the National Energy Globe Award for Nauru and was recognised by the Sustainable Energy Association of NZ with a Best Grid-Connected System award.
Existing contracts, client relationships and service commitments across both businesses would continue without interruption, Sunergise said.
WEL Networks said the sale would allow it to focus on its core electricity network and generation operations.
Infratec had provided energy infrastructure design and development services for projects with a combined capacity of more than 250MW over the past six years, including more than 100MW of completed or under-construction assets in the Waikato region, WEL said.
The company would continue delivering projects across NZ and internationally under the Sunergise brand, including projects already underway, WEL said.
WEL Networks bought Infratec in late 2020, after it had previously operated under Alpine Energy.
Founded in 2012, Sunergise has installed more than 50MW of solar capacity across NZ and the Pacific. Its projects include a 5.3MW rooftop solar installation at Fisher & Paykel Healthcare and a 2.3MW installation at the South Auckland shopping precinct Mānawa Bay.
The Sunergise Group comprises Sunergise, PowerSmart, Clay Energy and Infratec.
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