Australia’s small-scale solar sector saw significant expansion in the third quarter of 2026, with 894 megawatts (MW) of new rooftop solar capacity installed across 90,042 systems. This robust growth was detailed in the Clean Energy Regulator’s (CER) Q3 2026 data workbook, released on October 15, 2026, providing crucial insights into the nation’s renewable energy trajectory.

The surge in installations has contributed to a national distributed solar capacity now standing at 27 gigawatts (GW) from 3.9 million consumer energy resources (CER) installations, marking a 12% year-on-year increase. This sustained uptake, however, is influencing the Small-scale Technology Certificate (STC) market, directly impacting the upfront cost of solar systems for Australian households and businesses.

STC Market Fluctuates Amidst High Volume

The STC spot market price, which directly translates to a discount on new solar installations, has experienced fluctuations. After reaching a high of $39.90 on October 16, 2026, the price settled at approximately AUD $39.65 by October 30, 2026. By early November, the STC Clearing House reported a surplus of 2.38 million certificates, indicating a healthy supply driven by the high volume of new installations.

This dynamic market means that while the underlying demand for solar remains strong, the exact value of the rebate received by consumers can shift. For a typical 6.6 kW solar system, which generates approximately 99 STCs in Zone 3 (Sydney, Perth, Adelaide), a $39.65 STC price translates to a federal rebate of around $3,925.35. This figure is a critical component in the overall cost of a new system, which homeowners can explore further in guides like How Much Does a 6.6kW Solar System Cost in Australia in 2026? Your State-by-State Guide to Prices & Rebates.

“The consistent high volume of small-scale solar installations in Q3 2026 underscores Australia’s commitment to renewable energy, but it also creates a dynamic STC market that homeowners and installers must monitor closely to maximise savings.”

Mid-Scale Solar Systems Now Eligible for STCs

Further shifting the landscape, the federal government expanded eligibility for Small-scale Renewable Energy Scheme (SRES) support to mid-scale solar systems ranging from 100 kW to 1 MW. Effective from October 1, 2026, these larger systems can now create STCs based on a five-year deeming period until 2030, offering new financial incentives for larger commercial and industrial installations. This policy change is expected to drive further uptake in the commercial sector, potentially increasing STC supply and influencing market prices in the long term.

State-by-State Solar Dominance

The Q3 2026 data highlighted key regions leading Australia’s solar charge. New South Wales reached 9.3 GW of distributed solar capacity, closely followed by Queensland at 8.3 GW. Queensland continues to lead in total installations with over 1.2 million systems, while South Australia boasts the highest household penetration, with nearly 58% of homes now equipped with solar panels. Western Australia also demonstrated strong growth, contributing significantly to the national figures.

This regional variation reflects diverse state-level policies, grid conditions, and consumer adoption rates. The ongoing integration of solar into the National Electricity Market (NEM) is also supported by the increasing uptake of home battery storage, which helps shift renewable energy into evening peaks. For those considering optimising their energy usage, understanding options like Is a Home Battery Worth It in 2026? Unlocking $1,000s in Savings for Your Existing Solar is crucial.

Outlook for Q4 2026

With the Q3 data now publicly available, the industry awaits the full Quarterly Carbon Market Report, expected in mid-December 2026, for more detailed analysis and insights. The continued strong installation rates, coupled with the expansion of STC eligibility to mid-scale systems, suggest that Q4 2026 will likely see sustained activity in the Australian solar market. Consumers are encouraged to remain informed about STC values and the broader energy market to make timely decisions on their solar investments and potentially reduce their overall electricity bills. Reviewing options to Compare Electricity Retailers 2026: Unlock $150+ Annual Savings in Australia can complement solar savings.

While the STC market remains dynamic, the underlying trend of increasing solar adoption and supportive government policies continues to position Australia as a global leader in renewable energy.