This specification was prepared by the P4790 – Solar PV and battery storage systems Technical Advisory Group. The membership of the committee was approved by the New Zealand Standards Executive under the Standards and Accreditation Act 2015. . The Authority's former Market Development Advisory Group estimated up to $37 billion in new investments will be needed in generation, demand-side flexibility and energy storage by 2050, to meet increased electricity demand. Standards New Zealand gratefully acknowledges the. . By boosting renewable energy flexibility, it will deliver reliable electricity to thousands of homes, enhancing the stability of the power grid while also reducing the region's carbon footprint. The Glenbrook BESS project began with the task of designing a 100-megawatt (200-megawatt hour) Tesla. . Tesla selected as battery energy storage system supplier, the first Megapack 2 XL project in New Zealand. The battery system will discharge stored energy at a split second to significantly improve security of energy supply to New Zealanders. The project will be operational by March 2026.