According to data from the Clean Energy Regulator (CER), Australia had recorded 4,154,426 solar installations by 30 June 2025, representing more than 26.7 GW (gigawatts) of cumulative capacity.
These figures reinforce Australia’s position as the world leader in per-capita solar generation and highlight the continued importance of rooftop PV (photovolatic) in the national energy mix.
Analysing data points from Green.com.au, solar installers can see a market that remains active despite moderating installation volumes.
Total solar installs in Australia over time
While annual installation numbers have eased from the record 377,458 systems installed in 2021, rooftop solar continued to deliver strong capacity growth in 2024. A total of 317,857 systems were installed during the year, down 4.8 per cent on 2023, but the sector still added approximately 3.2 GW of new capacity.
These trends suggests households are increasingly opting for larger systems. Across Australia’s installed base, the average rooftop solar system size now sits at about 6.43 kW (kilowatts).
State-level results reveal differing market conditions. New South Wales remained the largest rooftop solar market in 2024, accounting for 97,475 installations, or 31 per cent of the national total. Queensland followed with 81,311 installations. Notably, Queensland and Western Australia were the only states to record year-on-year installation growth during 2024.
Rooftop solar’s contribution to the grid has also continued to increase over the last couple of years.
Clean Energy Regulator and Clean Energy Council data shows rooftop PV generated 30,178 gigawatt-hours of electricity in 2024, making it Australia’s fourth-largest source of electricity generation behind black coal, wind and brown coal.
