Network projects

• Proactive testing and maintenance of Evoenergy assets

As part of our commitment to delivering safe and reliable energy to the community, we have implemented a series of long-term projects to monitor the condition of our high voltage (HV network. An annual inspection program uses thermography technology to detect ‘hotspot’ areas that have potential to be degraded due to weather, aging infrastructure, or external impacts.

Where hotspots are detected, we proactively repair them to minimise reliability issues across the network. Condition based testing strengthens network reliability and gives us valuable insights into the overall health of our assets, allowing us to better forecast infrastructure lifecycles and plan for the future.

• Upgrading power supply for Canberra schools

We have been proactively working with Canberra schools to upgrade their electricity supply as the community begins to transition towards electrification.

Recognising the need for increased demand, we have responded with plans to upgrade our network capacity. This will include the installation of padmount substations across the Woden, Canberra Central, Belconnen and Tuggeranong regions to support Canberra schools.

• Increasing conduits and feeders across Canberra

Evoenergy is managing continued growth across the network, by proactively installing infrastructure to support the build of new assets across the regulatory period. We have been working with other organisations, such as the City Renewal Authority, Suburban Land Agency, Infrastructure Canberra and the National Capital Authority on proactively installing electrical infrastructure while major Government infrastructure projects are occurring throughout the ACT region, this looks to strengthen the future of the energy network.

• NSW Battery Support

Supporting the connection of 1 large-scale third party owned battery in Williamsdale which has a storage capacity of 500MWh. While located in NSW, this battery will connect to the Evoenergy grid with energisation expected by early 2026.

To improve reliability in the Gungahlin region, we conducted a comprehensive review of the network, focusing on design, asset performance and servicing, inspections, and load balancing.

This review has led to a series of long-term initiatives aimed at strengthening the network and ensuring a stable supply into the future. Specifically, we have invested or are investing in the following infrastructure upgrades:

Completed 2024:

• A high voltage cable extension project in Jacka/Bonner was completed (August 2024) for better supply distribution.
• A 315kVA distribution substation in Taylor was upgraded to 500kVA in November 2024 to cater for increased solar penetration and network reliability.

Completed 2025:

• Two new 500kVA distribution substations were installed in Casey (March 2025) and Ngunnawal (June 2025). These substations have capacity to deliver more power and technology that allows Evoenergy to restore supply in a shorter timeframe.
• We have been working on implementing Battery Energy Storage Systems (BESS) to improve power quality, reliability and hosting capacity in the ACT. Installed 3 Evoenergy owned and operated neighbourhood-scale batteries in Casey, Dickson and Fadden which store between 225kWh – 450kWh each.
• Conducted additional inspections of approximately 40 Gungahlin substations to identify where further repairs may be required and to inform future maintenance regimes.
• Installing remote-control switches and creating feeder ties to enhance response to faults, minimise the number of customers impacted, and reduce outage duration.

Upcoming:

• Continue to install remote-control switches and creating feeder ties to enhance response to faults, minimise the number of customers impacted, and reduce outage duration.
• Reviewing and where possible, bringing forward planned works from financial year 2027 to deliver additional feeders sooner, supporting long-term growth and resilience.
• A fourth distribution substation will be upgraded in Throsby with increased capacity and on-load tap changers (OTLCs) to manage solar growth in the area (mid-2026).
• A second high voltage cable extension project is planned in Amaroo/Jacka (April 2027) and will increase the capacity of supply to meet future growth in the area.
• A third high voltage cable extension project is planned in Gungahlin/Franklin/Harrison/Throsby (mid-2028) and will increase the capacity of supply to meet future growth in the area.
• The Gold Creek zone substation was constructed with two 57MVA 132/11kV power transformers and provisions for a third power transformer to be installed. The third 55MVA 132/11kV power transformer is part of Evoenergy’s five-year electricity plan with energisation expected by early 2028. When complete, it will provide reliable supply to an additional 20,000 homes and improve reliability to existing customers in the area.

The Molonglo Valley is projected to grow significantly over the next 30 years. To support the region’s future electricity needs, the following projects are currently underway:

Completed:

• Upgraded a padmount substation in Denman Prospect to increase capacity with built in on-load tap changers (OTLCs) to manage solar growth in the area (July 2025).
• A second padmount substation was upgraded in Denman Prospect (July 2025). This will increase capacity with built in on-load tap changers (OTLCs) to manage solar growth in the area by mid-2026.
• We have implemented Battery Energy Storage Systems (BESS) to improve power quality, reliability and hosting capacity in the ACT. Installed 4 temporary and 2 retained containerised batteries in Denman Prospect which store 600kWh each.
• Connected 1 large-scale third party owned battery in Molonglo Valley which has a storage capacity of 14.95MWh. Contracted services will provide additional network support.
• Stage 1 of the Molonglo zone Substation included land acquisition, the development application (DA) approval and civil works. The construction and execution of the Molonglo zone substation commenced in June 2024.

Upcoming:

• The 132/11kV Molonglo zone substation (at the corner of Coulter Drive and William Hovell Drive) will provide an additional capacity of 55MVA into the network and is expected to be energised in early 2026.
• Develop and construct two new high voltage 11kV feeders that run from the Molonglo zone substation towards Denman Prospect and Whitlam - both are anticipated to be energised by May 2026.
• Increase low voltage (LV) circuits by adding additional feeders to existing padmount substations to more evenly distribute the electricity load by mid-2026.
• Installing remote-control overhead switch to allow faster restoration of power during unplanned outages scheduled for November 2025 in Coombs.

Upcoming:

• In order to meet growing energy demands, a zone substation, consisting of one 132/11kV power transformer (with provisions for two more transformers) will be built to supply the Strathairn region. We have begun the process to acquire land and submit a development application (DA) for this proposed zone substation and have forecasted energisation for 2030.

To strengthen reliability in this area, Evoenergy has a number of projects underway:

Completed:

• Installed remote-control overhead switches to allow faster restoration of power during unplanned outages – with two completed in 2024 (Holder, Duffy, Weston).

Upcoming:

• Installing three more remote-control overhead switches one scheduled for October 2025, and three more by November 2025 (Weston, Coombs).

Completed:

• We have implemented Battery Energy Storage Systems (BESS) to improve power quality, reliability and hosting capacity in the ACT. Installed 3 Evoenergy owned and operated neighbourhood-scale batteries in Casey, Dickson and Fadden which store between 225kWh – 450kWh each.

Completed:

• We have implemented Battery Energy Storage Systems (BESS) to improve power quality, reliability and hosting capacity in the ACT. Installed 3 Evoenergy owned and operated neighbourhood-scale batteries in Casey, Dickson and Fadden which store between 225kWh – 450kWh each.