Australia\'s Rooftop Solar Hits 28.3 GW — Now Bigger Than the Entire Coal Fleet

Rooftop Solar: Australia's Biggest Power Station

Australia reached a landmark energy milestone at the end of 2025: the nation's combined rooftop solar capacity hit 28.3 GW, representing approximately 4.3 million installations across the country. To put that in perspective, Australia's entire coal-fired power fleet stands at just 22.5 GW — meaning rooftop solar alone now surpasses coal by nearly 6 GW.

Clean Energy Council Chief Executive Jackie Trad summed it up: “Our biggest power station now resides on the rooftops of more than 4.3 million households.”

In the second half of 2025, rooftop solar contributed 14.2% of total electricity generation, up from 13.4% in the same period of 2024. This steady growth confirms that solar is no longer a niche technology — it is mainstream Australian energy infrastructure.

2025 Installation Trends: Fewer Systems, More Power

While the total number of new installations dipped 15% year-over-year — from 300,375 in 2024 to 254,664 in 2025 — the story is more nuanced than it first appears. The capacity added in 2025 reached 2.6 GW, with 1.5 GW installed in the second half alone. Australian households are increasingly choosing larger, higher-capacity systems that generate more power per installation.

Over the past five years, Australia has averaged 2.7 GW of new rooftop solar capacity annually. At this trajectory, AEMO's 2030 forecast of 36.1 GW capacity could be exceeded by 1 GW ahead of schedule — a remarkable achievement driven largely by household investment.

Batteries: The Next Chapter of Australia's Solar Story

The real headline from 2025 was home batteries. In the second half of the year alone, 183,245 home batteries were installed — a fourfold increase over H2 2024. To put that in context, the H2 2025 battery installations were equivalent to 99% of all battery sales from 2020 to 2024 combined.

By the end of 2025, 454,753 Australian households had home battery systems installed. Jackie Trad noted that the government's $7.3 billion Cheaper Home Batteries initiative, launched on 1 July 2025, had “strapped a rocket” to battery adoption.

The driving forces are clear: falling feed-in tariffs (now under 5c/kWh in many states) have made it uneconomical to simply export solar power to the grid. Batteries allow households to store excess solar generation for use during expensive peak evening hours — turning a depreciating solar asset back into a money-saving one.

Why This Matters for Every Australian Homeowner

The shift from coal to rooftop solar is not just an environmental story — it has direct financial implications for households. As more solar floods the grid during the day, daytime electricity prices fall. But evening peak prices remain high, creating a growing gap between what solar exports earn and what grid electricity costs during the hours families actually use the most power.

A home battery bridges this gap. By storing cheap daytime solar and discharging it during expensive peak periods, a well-sized battery can save the average Australian household $1,500 to $2,500 per year on electricity bills — and provide backup power during grid outages.

How Super Solar Energy Can Help

Whether you're adding solar for the first time or looking to pair your existing system with a battery, Super Solar Energy makes the entire process simple, transparent, and hassle-free.