The Northern Battery will be located on the site of the former Northern Power Station, a 560MW coal-fired facility decommissioned in 2016. The project will repurpose existing substation infrastructure at the Port Augusta site.
The Northern Battery will have a nameplate capacity of 270MW and total storage capacity of 1,080MWh, configured to operate as an 8-hour BESS when required, according to the AMPYR project page.
The 5.3.4 letter is one of the most demanding milestones in Australia’s grid connection process. Before AEMO issues the letter, developers must complete power system modelling, hundreds of simulations, network studies and collaborative workshops with the network service provider.
Any alterations made during construction that could affect the project’s electrical characteristics must subsequently be updated through a separate R1 process.
As previously reported by Energy-Storage.news, AMPYR acquired the Northern Battery in November 2025, purchasing it from Green Gold Energy under a deal that kept GGE involved as a joint development partner.
