The development application has been approved for a key component to Canberra's so-called $400 million "Big Battery" project, with the grid-scale Williamsdale installation to begin construction later this year.
At 250 megawatts of storage, it will be second only in size to the 300MW Territory Battery, planned to be built by French multinational Neoen, directly south of the Stockdill substation south of Holt.