Can WA's Isolated Grid Hit 80% Renewables by 2030? Billions in New Projects Approved in 2026

Western Australia’s ambitious target of achieving 80% renewable energy by 2030 has received a significant boost this week with the federal government announcing the results of Capacity Investment Scheme (CIS) Tenders 5 and 6 for the state. Ten new renewable energy and battery storage projects, representing over AUD$5 billion in new investment, have been approved, set to deliver nearly 1.9 gigawatts (GW) of clean generation and 3.7 gigawatt-hours (GWh) of dispatchable storage.

This landmark announcement, made on May 5, 2026, underscores a concerted effort to transform Western Australia’s unique energy landscape. Unlike the interconnected National Electricity Market (NEM) spanning the eastern states, Western Australia operates the largest isolated grid in the world – the South West Interconnected System (SWIS). This isolation means the state cannot rely on interstate power transfers, placing a heightened emphasis on local generation, storage, and robust transmission infrastructure to maintain stability and reliability as coal-fired power stations are retired by the end of the decade.

Over AUD$5 Billion Channelled into WA’s Energy Future

The Capacity Investment Scheme (CIS) tenders have identified a diverse portfolio of projects crucial for WA’s energy transition. Tender 5 focused on renewable generation, securing contracts for six new wind farms and one solar-hybrid installation. These include major developments such as Neoen Australia’s Yathroo Wind Farm (420 MW) and Narrogin Wind Farm (168 MW), Shell Energy & Foresight’s Kondinin Wind Farm (130 MW), Synergy Renewable Energy Developments’ Tathra Wind Farm (240 MW), Tilt Renewables’ Waddi Wind Farm (108 MW), and Zephyr Energy’s Parron Maam Marang Wind Farm (470 MW). Trina Solar’s Killawarra Hybrid Project, combining 350 MW of solar with a substantial 2,100 MWh of battery storage, was also successful under Tender 5.

Tender 6 addressed dispatchable capacity, approving three significant battery energy storage systems (BESS). These include Enpowered & Plenary Group’s Collie Battery and Solar Hybrid Project (200 MW / 1,518 MWh), Neoen Australia’s Yathroo Battery (200 MW / 1,600 MWh), and Frontier Energy’s Waroona Renewable Energy Project – Stage 1 (82 MW / 565 MWh).

“Today’s announcement is a big moment for WA’s clean energy transition, and it shows what is possible when federal capital backs WA’s shift from coal and gas to renewables.”

These projects are projected to generate enough electricity to power over one million Western Australian households and support peak demand for more than 400,000 households for up to four hours. The investment is also expected to create over 7,000 jobs during construction and more than 500 ongoing operations and maintenance roles annually.

Beyond the raw figures, developers have committed to significant local benefits. Tender 5 projects alone have pledged an estimated AUD$67.1 million in community shared benefits, AUD$89.7 million in First Nations benefits, and over AUD$20.6 million in Australian-made steel. Tender 6 projects add a further AUD$8.6 million in community benefits, AUD$67.3 million for First Nations communities, and over AUD$1.6 million in Australian-made steel.

Bolstering the Grid with AUD$1.4 Billion in Transmission Upgrades

Complementing these generation and storage investments, the Western Australian government recently committed AUD$1.4 billion (or AUD$1.5 billion in some reports) to upgrade the SWIS through a new Powering WA Clean Energy Fund. Announced in late April 2026, this fund will be included in the 2026-2027 state budget and is critical for building the “energy highways” necessary to connect remote renewable energy zones to demand centres.

Key transmission projects benefiting from this fund include the Clean Energy Link (CEL) – East, which will expand the state grid to deliver more renewable energy to Perth and the South West, and the ongoing CEL – North infrastructure, unlocking clean energy flows from the Mid West. Together, these two transmission lines are designed to carry 3 GW of renewable energy capacity.

This holistic approach, combining substantial new generation and storage with essential grid reinforcement, positions Western Australia to navigate the complexities of its isolated grid and achieve its ambitious clean energy targets. The federal Capacity Investment Scheme provides revenue support for up to 15 years, offering certainty to investors and accelerating the pace of project delivery, with all approved projects expected to be operational by 2030.

For households and businesses, a more robust, renewables-dominated grid promises greater energy security and potentially more stable electricity pricing in the long term. As the state moves towards its 2030 goal, understanding these large-scale grid developments is crucial for all energy consumers. To explore strategies for managing your energy costs, consider reviewing guides such as How to Cut Your Electricity Bill This Winter in Australia 2026: Strategies After Federal Rebates End and Australia’s Top Energy-Efficient Home Upgrades 2026: Maximise ROI as Electricity Bills Soar This Winter.

The combined federal and state investments signal a clear path forward for Western Australia’s energy transition, demonstrating how significant capital and strategic planning can overcome the challenges of an isolated grid to deliver a cleaner, more reliable power system for all residents and industries by 2030. The success of these projects will be closely watched as a blueprint for other regions facing similar grid integration challenges globally.