Stubbo Solar Farm

The Stubbo Solar Project is a large‑scale renewable energy development located near the historic mining town of Gulgong in New South Wales. Capable of generating enough clean electricity to power around 185,000 average Australian homes each year, the project plays an important role in supporting the state’s target of 50% renewable energy by 2030. Built on cleared grazing land that allows sheep farming to continue beneath the solar panels, the project also reflects a balanced approach to land use. In 2023, ACEN Australia secured a 20‑year Long‑Term Energy Service Agreement, providing long‑term revenue stability and enabling continued investment in community, regional employment, and Indigenous participation. Insulect supported the project by supplying critical high‑voltage infrastructure to enable reliable grid connection at scale.

Challenge

Connecting a solar project of this size to the grid required electrical infrastructure capable of handling high power flows while maintaining safety, reliability, and compliance with network standards. The project needed dependable high‑voltage switching and insulation equipment that could operate consistently in a large, open rural environment. With long‑term operation and grid stability as key objectives, any weakness in the high‑voltage connection could impact energy delivery, asset performance, or system reliability.

Solution

Insulect supplied a coordinated package of high‑voltage equipment designed to support the scale and performance requirements of the Stubbo Solar Project. This included 330 kV disconnectors to enable safe isolation at the transmission level, along with 330 kV post insulators to provide strong mechanical and electrical support. At the medium‑voltage level, Insulect supplied 33 kV post insulators to support reliable operation within the project’s internal electrical network. All equipment was selected to meet the project’s technical specifications and long‑term operational demands.

Benefits

The supplied infrastructure provides safe and reliable switching, strong insulation performance, and long‑term durability under outdoor operating conditions. By using proven, high‑quality components, the project reduces the risk of unplanned outages and supports consistent energy export to the grid. Insulect’s ability to supply equipment across voltage levels simplified procurement and integration, giving ACEN Australia confidence in the robustness of the project’s electrical backbone.

Results

With Insulect’s high‑voltage equipment in place, the Stubbo Solar Project is positioned to deliver large‑scale renewable energy reliably for decades to come. The project contributes meaningfully to New South Wales’ clean energy transition while supporting local communities and regional development. This case study demonstrates Insulect’s capability to support major renewable energy projects with dependable infrastructure solutions that enable safe operation and long‑term performance at scale.