The WA Government has launched the Future Energy System Outlook (FESO), a long-term planning exercise for the South West Interconnected System (SWIS).
The Department of Energy and Economic Diversification has today commenced the Future Energy System Outlook (FESO), a long-term planning exercise for the development of Western Australia’s main electricity network, the South West Interconnected System (SWIS).
The FESO is a detailed, scenarios‑based study that guides planning and infrastructure investment in the SWIS to 2050. Each scenario presents a distinct and plausible view of how electricity demand and supply in the SWIS may evolve over time.
FESO 2027 will explore how current and future trends and commitments – including, rising demand, supply chain challenges, emerging technologies, net zero by 2050, economic growth and population growth – could shape the evolution of the SWIS.
By providing a clear, whole-of-system outlook, the FESO will help inform Government and private sector investment decisions and ensure that the SWIS continues to provide secure, reliable, and affordable electricity.
Stakeholder input is critical to ensure the analysis reflects emerging conditions and supports effective planning.
Engagement activities will begin with a public webinar on Wednesday, 15 July 2026, providing an overview of the FESO and the approach to determining scenarios for FESO 2027.
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