The Australian Energy Market Operator (AEMO) has unveiled its 2026 Integrated System Plan (ISP), a critical roadmap detailing the country’s energy transition through to 2050. Released on 25 June 2026, the ISP mandates an ambitious build-out of nearly 120 gigawatts (GW) of utility-scale wind and solar and a significant 64 GW of dispatchable storage capacity to ensure a secure, reliable, and affordable electricity supply as coal-fired power stations retire.
This biennial blueprint outlines the least-cost pathway for the National Electricity Market (NEM) to meet projected demand, which is expected to almost double by 2050, driven by electrification across homes, businesses, and new industrial loads such as data centres. The plan reaffirms that a system built around renewable energy, firmed with storage, backed by flexible gas, and connected through upgraded transmission networks, is the most economical approach.
The Scale of the Solar and Storage Build-Out
The ISP projects a substantial increase in solar and battery deployment across both large-scale and distributed assets. Utility-scale wind and solar capacity, currently around 23 GW, will need to expand fivefold to 117 GW by 2050, requiring an average of 3.9 GW of new capacity each year. This aggressive target underscores the pivotal role of large-scale solar farms in Australia’s future energy mix.
Simultaneously, distributed solar, primarily rooftop PV, is forecast to increase by 20 GW to reach 87 GW by 2050. This reflects a growing reliance on consumer-driven energy generation. AEMO expects rooftop solar to cover 56% of suitable homes in NEM regions by 2050, up from 36% today.
Energy storage is equally critical. Dispatchable storage capacity, encompassing batteries, virtual power plants (VPPs), and pumped hydro, must grow 11-fold from its current 6 GW to 64 GW by 2050. This equates to an average annual increase of 2.6 GW. Consumer batteries are projected to contribute 35 GW of this storage capacity by 2050.
“Renewable energy, firmed with storage, backed up by gas and connected with upgraded networks, remains the least-cost roadmap to meet Australia’s energy needs.” — Daniel Westerman, AEMO CEO
Investment and Infrastructure Challenges
Achieving these targets demands significant investment. The ISP’s Optimal Development Path (ODP) estimates around AU$106 billion in annualised capital investment to 2050 (in today’s dollars), covering generation, storage, transmission, distribution, and system security costs. A crucial component of this is the development of approximately 6,000 km of new transmission lines to connect renewable energy zones (REZs) to demand centres. This network expansion is projected to save consumers AU$30 billion in avoided capital, operating, and fuel costs.
However, AEMO highlights that the primary challenge is not planning but delivery. The gap between projects in the ‘probable queue’ and those reaching final investment decision remains substantial. Supply chain constraints, lengthy approval processes, and social licence issues are identified as key hurdles that could slow the transition and erode benefits for consumers.
Moreover, the ISP factors in distribution network development for the first time, allocating AU$600 million for investments to connect grid-scale generation and storage within distribution networks and support consumer energy resource (CER) refinements. This includes AU$214 million specifically for voltage management to unlock 4 GW of latent CER capacity.
The Role of Consumer Energy Resources
The ISP places a strong emphasis on the growing contribution of consumer energy resources (CERs), including rooftop solar, home batteries, and electric vehicles. These technologies are crucial for reducing costs, supporting grid reliability, and optimising existing infrastructure.
By 2050, AEMO forecasts that approximately two-thirds of homes with solar will also have batteries. The orchestration of around half of the collective CER capacity through virtual power plants (VPPs) could save the system an estimated AU$7.2 billion in avoided grid-scale investment. This highlights the increasing importance of smart energy management at the household level.
Homeowners considering solar and battery installations should review their options for maximising self-consumption and participating in future grid services. Understanding your current and future electricity needs is essential for selecting the right system. For more information, read our guide on What Solar System Size Do You Really Need in Australia 2026? Future-Proofing for EVs & Electrification.
The integration of smart meters is also crucial for enabling households to actively participate in the new energy landscape and potentially benefit from demand response programs. Learn more about optimising your energy usage with a smart meter by reading Unlock $800+ Savings: Your Smart Meter Guide for Australia 2026.
As the grid evolves, home battery systems will play an increasingly vital role in providing backup during outages and contributing to grid stability. Explore your options for energy resilience with our guide: Home Battery Backup for Blackouts in 2026: Systems & Costs from $7,000.
Looking Ahead
The 2026 ISP is a clear directive: Australia’s energy future is overwhelmingly renewable, with solar and storage at its core. While the targets are ambitious, AEMO’s roadmap provides a pathway for industry, government, and consumers to collaborate in delivering a cleaner, more resilient, and affordable energy system for all Australians. The focus now shifts firmly from planning to accelerated delivery to realise these benefits by 2050.