The electricity from the Narrogin BESS project will flow into the Narrogin South Substation at 220kV level. From there, it will go to where the demand is greatest first. Typically, some will be flowing through the 220kV/66kV transformer at the substation, and flow into the 66kV network serving the local area.

Electricity from the Narrogin BESS project will be supplied to and from the high voltage 220 kV transmission network. These larger networks function like freeways on road networks, allowing large amounts of power to flow long distances with minimum loss.

Some electricity will exit along the way and step down to a lower voltage network (132kV or 66kV) before feeding into distribution networks (33kV and below) that transfer electricity to individual energy users such as households, businesses, and industries. These smaller distribution networks are like local streets in road networks.

Spanning an area of approximately 25 hectares, the first stage of the grid-scale BESS will occupy around 5 ha have an estimated network capacity of 200 megawatts (MW), and 800 megawatt-hour (MWh) energy storage capacity. The Narrogin BESS project on a 4-hour discharge cycle is expected to discharge enough energy to power the equivalent of approximately 70,000 households.