Australia has the highest per-capita rooftop solar of any country on Earth — roughly 1 in 3 homes, across 4.3–4.4 million systems. Not because of one giant project. Because of millions of ordinary roofs.
Enter any Australian postcode for estimated annual output, savings, and payback.
Data: global satellite data · Coordinates: Zippopotam.us · Performance ratio: 0.80 · Estimates only — actual output depends on tilt, shading and orientation.
Peak sun hours are not the same as hours of daylight — they measure how many hours a day deliver a full 1,000 W/m² of irradiance. Western Australia and the Northern Territory lead; Victoria and Tasmania see the least, though even the lowest end is well above what most of Europe gets.
| City | State | Peak sun hours/day | Rating |
|---|---|---|---|
| Perth | WA | 5.8 | Best |
| Darwin | NT | 5.6 | Excellent |
| Brisbane | QLD | 5.2 | Excellent |
| Adelaide | SA | 5 | Very Good |
| Canberra | ACT | 4.7 | Good |
| Sydney | NSW | 4.5 | Good |
| Melbourne | VIC | 4.1 | Fair |
| Hobart | TAS | 3.9 | Lowest |
Australia leads the world in per-capita rooftop solar. Queensland has the most individual installations; New South Wales has the most total capacity; South Australia leads on household penetration rate.
| Installed rooftop capacity | ~28–30 GW | Early 2026 |
| Rooftop systems installed | ~4.3–4.4M | Early 2026 |
| Homes with rooftop solar | ~1 in 3 | CER/ABS |
| Average system size | 6.4–6.7 kW | 2025–26 installs |
| Most installations (state) | Queensland | 1.16M systems |
| Most capacity (state) | New South Wales | ~8 GW |
| Highest penetration rate | South Australia | Household share |
| CER projection by 2030 | 36 GW | Clean Energy Council |
Batteries are the next wave. The federal Cheaper Home Batteries Program discounts eligible systems, and three states began offering free electricity for part of the day from July 2026 — a direct result of how much rooftop solar the grid now carries at midday.
| Cheaper Home Batteries discount | ~30% | Federal scheme |
| Batteries installed under scheme | 420,000+ | By mid-2026 |
| Usable battery capacity added | 12+ GWh | By mid-2026 |
| Free electricity window | Up to 3 hrs/day | 3 states, from Jul 2026 |
| Q1 2026 small-scale solar | 791 MW | Quarterly record |
| Typical rooftop cost per kW | ~US$840 | Before rebates |