Western Australia’s energy landscape is set for a significant transformation following the announcement of successful tenders under the federal Capacity Investment Scheme (CIS). On 2 May 2026, the Assistant Minister for Climate Change and Energy confirmed the approval of ten new renewable energy and battery projects for the state, representing a substantial investment of over $5 billion. These projects are poised to deliver 1.886 gigawatts (GW) of new renewable electricity generation and 3.683 gigawatt-hours (GWh) of standalone battery storage, fundamentally reshaping the South West Interconnected System (SWIS) by 2030.
This influx of generation and storage capacity is critical for Western Australia, an isolated grid that cannot rely on interconnections with other states. The projects are designed to maintain power reliability as the state’s older, state-owned coal-fired generators are progressively retired, and electricity demand continues to grow. The federal and state governments stated that these initiatives will “help keep the lights on, put downward pressure on power prices and cut emissions with cheaper, cleaner renewable energy backed by storage.”
The Capacity Investment Scheme: Driving WA’s Energy Future
The Capacity Investment Scheme (CIS), a federal government initiative, aims to unlock new investment in clean dispatchable capacity across Australia. For Western Australia, Tenders 5 and 6 specifically targeted projects to bolster the Wholesale Electricity Market (WEM). The scale of the successful bids exceeded expectations, with the 10 winning projects chosen from 25 submissions.
Among the successful projects are six new wind farms, two solar-battery hybrids, and two minimum seven-hour battery storage facilities. Key projects include Tilt Renewables’ Waddi wind farm, Trina’s 350 MW Killawarra solar-hybrid, and Enpowered and Plenary Group’s Collie battery and solar hybrid, which alone offers 200 MW of generation and 1518 MWh of storage.
“These projects will help keep the lights on, put downward pressure on power prices and cut emissions with cheaper, cleaner renewable energy backed by storage.” — Joint statement from federal and state governments.
Collectively, these projects are projected to produce enough electricity to power more than one million Western Australian households and support peak demand for over 400,000 households for up to four hours. The economic benefits extend beyond energy supply, with estimates suggesting the projects will support more than 7,000 jobs during construction and over 500 ongoing operations and maintenance roles annually over their lifetime.
Strategic Importance for Western Australia
Western Australia’s grid faces unique challenges due to its isolation from the National Electricity Market (NEM). The state government has set an ambitious target of 80 per cent renewables by 2030, a goal that these CIS projects are instrumental in achieving. The coordinated investment addresses the need for both renewable generation and the firming capacity provided by large-scale batteries, crucial for managing the intermittency of wind and solar. This strategic approach helps to mitigate risks associated with the planned retirement of coal-fired power stations, ensuring a stable and reliable electricity supply for residents and industries alike.
In addition to direct energy benefits, the projects supported under Tender 5 have committed significant community and First Nations benefits. These include an estimated $67.1 million in community shared benefits and $89.7 million in First Nations benefits, along with over $20.6 million specifically allocated for Australian-made steel.
Broader Policy Context and Consumer Impact
This federal and state collaboration highlights a concerted effort to accelerate Australia’s energy transition. The CIS framework allows for targeted investment in regions like Western Australia, where energy security and decarbonisation are paramount. For consumers, the successful deployment of these projects is expected to contribute to lower energy bills over time by increasing the supply of cheaper, renewable electricity. This aligns with broader national efforts to alleviate cost-of-living pressures and transition towards a cleaner energy economy. Australian households looking to manage their energy expenditure can explore strategies such as those outlined in our guide: How to Cut Your Electricity Bill This Winter in Australia 2026: Strategies After Federal Rebates End.
Furthermore, the focus on large-scale battery storage reinforces Australia’s commitment to grid stability. As more renewable energy comes online, the ability to store and dispatch power as needed becomes increasingly vital. This complements efforts by homeowners to enhance their own energy independence through rooftop solar and home batteries, and to consider wider energy efficiency upgrades. For those considering improvements to their homes, insights can be found in Australia’s Top Energy-Efficient Home Upgrades 2026: Maximise ROI as Electricity Bills Soar This Winter.
While the announcement marks a significant milestone, the successful and timely delivery of these projects will require ongoing collaboration between governments, industry, and local communities. The integration of such substantial new capacity into the grid demands meticulous planning and execution to ensure Western Australia’s energy transition remains on track for its 2030 targets and beyond. The state’s unique grid characteristics mean that robust policy and investment remain critical for a secure, reliable, and affordable energy future.
Project Details Overview
| Feature | Details |
|---|---|
| Announcement Date | 2 May 2026 |
| Scheme | Federal Capacity Investment Scheme (CIS) Tenders 5 & 6 |
| Location | Western Australia (South West Interconnected System - SWIS) |
| Total Investment | Over $5 billion |
| Number of Projects | 10 (6 wind farms, 2 solar-battery hybrids, 2 standalone batteries) |
| New Generation Capacity | 1.886 GW |
| New Battery Storage | 3.683 GWh |
| Household Supply | Enough electricity for over 1 million WA households; support peak demand for over 400,000 households for up to four hours |
| Job Creation | >7,000 during construction; >500 operations and maintenance jobs annually |
| Community/First Nations | ~$67.1 million in community benefits; ~$89.7 million in First Nations benefits; >$20.6 million in Australian-made steel (from Tender 5 projects, subject to final contracts) |