Australia’s clean energy transition is at a critical juncture, with new data revealing a sharp dichotomy in the sector’s progress. The Clean Energy Council’s (CEC) Clean Energy Australia 2026 report, released on 26 May 2026, highlights a massive 260% increase in home battery sales in 2025. This surge in residential storage stands in stark contrast to a concerning slowdown in financial commitments for new large-scale solar and wind projects, signalling potential challenges for Australia’s ambitious renewable energy targets.
The report indicates that while Australia’s battery market boomed, becoming the third-largest utility-scale battery market globally (behind China and the United States), investment in the new large-scale generation required to replace retiring coal plants has reached a decade low.
Residential Batteries Power Ahead
Australians are rapidly embracing home battery storage, with 268,675 home batteries purchased in 2025, a significant jump from 74,582 in 2024. This impressive uptake underscores a growing consumer desire for energy independence, resilience against grid outages, and optimising self-consumption of rooftop solar generation amidst fluctuating electricity prices and declining feed-in tariffs. The report notes that small-scale storage uptake “took off in a big way” in 2025.
For many homeowners, combining solar PV with a battery system is becoming an increasingly attractive proposition to maximise savings and reduce reliance on grid electricity during peak demand periods. Understanding the financial implications, such as the What is the Real Payback Period for a Solar and Home Battery System in Australia 2026?, is crucial for those considering this investment.
Simultaneously, large-scale battery capacity also saw substantial growth, increasing by 233% in 2025. Twelve large-scale battery projects, totalling 2 GW of capacity, were commissioned across the National Electricity Market (NEM) and the South West Interconnected System (SWIS) in 2025, up from 600 MW in 2024. This indicates significant progress in grid-scale storage, which is vital for stabilising the network as more intermittent renewables come online.
Solar Generation Mixed, Large-Scale Investment Falters
While the battery sector soared, the picture for solar generation presented a more nuanced view. Rooftop solar installations in Australia contributed 13.9% of the nation’s electricity in 2025. However, the report also highlighted a 19% decrease in new rooftop solar capacity completed in 2025, with 2.6 GW installed compared to the previous year.
In contrast, utility-scale solar projects saw a 100% increase in commissioned capacity in 2025, with 18 projects totalling 2 GW coming online. Overall, renewable energy generated 42.7% of Australia’s electricity in 2025, up from 38.9% in 2024.
Despite these gains, the CEC’s report issued a stark warning regarding future renewable energy supply:
“The number that demands attention is going in the wrong direction: financial commitments for large-scale wind and solar is at a decade low. That is a gap we must close.”
This slowdown in investment for new large-scale solar and wind projects poses a significant risk to Australia’s target of 82% renewable electricity by 2030. The CEC emphasised that removing barriers to investment in these projects must be the sector’s highest priority in 2026.
Investment Challenges and What It Means for Supply
The report underscores a challenging development environment that is negatively influencing investment. Factors contributing to this slowdown may include grid connection delays, planning complexities, and policy uncertainty for developers. Without a consistent pipeline of new large-scale generation, the ambitious targets set for the coming years will be difficult to achieve, potentially impacting wholesale electricity prices and the stability of the grid.
For homeowners, the continued growth of rooftop solar and home batteries offers a degree of insulation from these broader grid challenges. Programs like Australia’s Best VPP Programs & $5,000+ Rebates for Home Batteries in 2026 provide opportunities to not only save money but also contribute to grid stability.
Key Data from Clean Energy Australia 2026 Report
| Category | 2024 Data | 2025 Data | Change (Year-on-Year) |
|---|---|---|---|
| Home Battery Sales | 74,582 units | 268,675 units | +260% |
| Large-Scale Battery Capacity | 600 MW | 2 GW | +233% |
| New Rooftop Solar Capacity | Not specified | 2.6 GW | -19% |
| New Utility-Scale Solar Projects | 9 projects (1 GW) | 18 projects (2 GW) | +100% |
| Share of Renewables in NEM | 38.9% | 42.7% | +3.8 percentage points |
Note: Data extracted from the Clean Energy Council’s Clean Energy Australia 2026 report.
Outlook for Australian Solar and Batteries
The CEC’s report paints a picture of a dynamic energy landscape. While residential consumers and grid operators are rapidly adopting battery storage to harness the benefits of solar, the foundational challenge of building sufficient large-scale renewable generation persists. Addressing the barriers to investment in utility-scale solar and wind projects will be critical for Australia to meet its 2030 targets and secure a reliable, affordable, and clean energy future. Homeowners interested in leveraging the benefits of batteries can explore options like Retrofitting Solar Batteries in Australia 2026: Your Guide to $4,200+ Rebates to enhance their existing solar systems.