Meridian Energy Ltd (NZX: MEL) has successfully commissioned what it describes as New Zealand’s first large-scale grid-connected battery energy storage system (BESS), a milestone in the country’s transition to a more resilient and flexible energy future.
The newly operational Ruakaka BESS, located south of Whangārei on the North Island, boasts a capacity of 100 megawatts and can deliver 200 megawatt-hours of electricity—enough to power approximately 60,000 average homes for two hours during the winter season. The system enables load shifting between peak and off-peak periods, strengthens grid resilience in the Northland region, and allows Meridian to participate in the North Island electricity reserves market.
“This BESS is a new and exciting addition to our asset portfolio,” said Guy Waipara, Meridian Energy’s general manager of development. “It was delivered within the project’s original NZD 186 million capital envelope and adds meaningful capability to our operations.”
Developed using battery technology from Saft, a subsidiary of French energy major TotalEnergies SE (EPA: TTE), construction of the Ruakaka BESS began in early 2023.
The BESS forms part of a broader clean energy initiative that includes a 130-MW solar farm, slated to break ground in August. Once completed, the solar project will feature 250,000 photovoltaic panels and is expected to generate up to 230 GWh of electricity annually. Commissioning is anticipated in early 2027.
Meridian’s integrated solar and storage development underscores the company’s long-term strategy to decarbonize New Zealand’s energy supply while enhancing grid reliability and market flexibility.
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