What Australian homeowners typically pay for rooftop solar after the federal STC discount — and why your installer quote still matters more than any average. Written by the MrSolar Editorial Team.
These bands reflect competitive metro quotes published by Australian price indexes and installer feedback in 2026. They are not a quote. Roof complexity, brand tier, DNSP export limits, and labour rates move the number.
| System size | Typical price after STC | Who it suits |
|---|---|---|
| 3kW | $3,000–$5,000 | Small homes / low daytime use |
| 5kW | $4,000–$6,500 | Average 3-bed home |
| 6.6kW | $5,000–$8,000 | Most popular residential size |
| 10kW | $7,000–$12,000 | Larger homes, pools, EVs |
| 13.3kW | $9,000–$15,000 | High usage / future battery |
Competitive metro 6.6kW installs often land toward $5,000–$7,500 after STC; $8,000 sits at the upper end for premium hardware, difficult roofs, or regional labour.
Use these as research ranges before you request quotes. Always confirm STC zone by postcode.
| City | Indicative 6.6kW after STC | Local notes |
|---|---|---|
| Sydney | $5,500–$8,000 | Zone 3 STC; Ausgrid / Endeavour / Essential |
| Melbourne | $5,000–$7,500 | Zone 4 STC; Solar Homes can stack for eligible homes |
| Brisbane | $5,000–$7,800 | Zone 3 STC; Energex SEQ |
| Perth | $4,800–$7,200 | Strong sun hours; Western Power rules |
| Adelaide | $4,800–$7,000 | SA Power Networks pre-approval + export limits |
STCs are calculated from system size × zone rating × remaining deeming years × spot price. MrSolar's master table uses $39.85 / STC as of 2026-08-05. Typical residential 5–10kW STC value across all zones is about $917–$2,550. Always ask installers to show the STC pass-through on the quote.
Adding a home battery commonly adds roughly $10,000–$16,000 before subsidies, depending on usable kWh and brand. The federal Cheaper Home Batteries Program has been available since 1 July 2025 (~$372/kWh usable capacity — about $3,720 off a typical 10kWh battery for eligible installs). State schemes (e.g. QLD Battery Booster, VIC Solar Homes battery) can stack in some cases — confirm eligibility.
Yes for many competitive metro quotes after STC. Premium brands, multi-storey roofs, or regional labour can push toward the top of the band or above. Always compare three written CEC-accredited quotes.
No. For most residential installs the STC value is assigned at the point of sale and deducted from the invoice by the installer.
Hardware prices move, but electricity tariffs and remaining STC deeming years also change the math. Getting comparable quotes now is usually better than guessing the market.
Compare firm numbers: get up to 3 free quotes from CEC-accredited installers near you, or browse Sydney, Melbourne, and our longer cost guide.
Join over 230,000 Australian homeowners who've used MrSolar to find their installer. No obligation, no spam — just competitive quotes from CEC-accredited professionals.
Get My Free Quotes →Takes 2 minutes. Free forever. CEC-accredited installers only.