Both the companies are waiting for regulatory approval to build the major gas-fired plant in response to rising demand.
The deal positions NOA to supply the mining sector with an estimated 1.5TWh of renewable energy annually.
This development comes after the two companies established a framework agreement in October 2025.
The agreement covers a thermal captive project and renewable energy to meet long-term industrial needs.
The BESS, located near Canowie, aims to enhance grid stability within the NEM.
The decision increases the planned generation capacity and sets out a timeline that includes first deployment later this decade and full build-out by 2030.
