Solar Rebate Australia 2026: How the STC Scheme Works
Australia's federal Small-scale Technology Certificate (STC) scheme cuts the upfront cost of solar by $1,500–$4,000+ depending on your location and system size — and it's automatically applied as a discount when you buy. Here's exactly how to maximise it before the 2030 deadline.
Muhammad founded KilowattKit after spending hours trying to decode confusing electricity bills and realising there were no clear, jargon-free tools for ordinary homeowners. He researches energy rates, solar payback, EV charging, and heat pump economics across the US, UK, Canada, and Australia — sourcing every figure directly from official government and regulatory data.
STC Scheme at a Glance
How the STC Scheme Works
When you install a solar system, it creates a number of Small-scale Technology Certificates. Each certificate represents 1 MWh of renewable energy the system is expected to generate over its deeming period. Your installer typically claims these certificates on your behalf and applies the value as an immediate discount on your invoice.
The STC formula
Then: Rebate value = STCs × current STC price (~$35–$40)
STC Zone Ratings by Location
| Zone | Locations | Rating | Rebate (6.6kW, 2026) |
|---|---|---|---|
| Zone 1 | Darwin, northern NT, inland QLD/WA | 1.622 | ~$2,010 (≈53 STCs) |
| Zone 2 | Northern NSW, most of QLD, northern SA/WA | 1.536 | ~$1,900 (≈50 STCs) |
| Zone 3 | Sydney, Perth, Brisbane, Adelaide, Canberra | 1.382 | ~$1,710 (≈45 STCs) |
| Zone 4 | Melbourne, Hobart, southern VIC, TAS | 1.185 | ~$1,480 (≈39 STCs) |
Example values calculated as: 6.6kW × zone rating × 5 deeming years (2026, reducing to 2030) × ~$38/STC, with STCs rounded down. The deeming period drops by one year every 1 January, so these values fall each year until the scheme ends in 2030. Actual values depend on the STC spot price at installation — check your exact postcode zone at cer.gov.au.
⏰ The deeming period is shrinking every year
The deeming period runs from your installation year to 31 December 2030. Each year you wait, you lose one year of deeming — reducing your STC count and your rebate:
How to Claim Your STC Rebate
Only CEC-accredited installers can legally create STCs. Every quote should show the STC discount separately from the gross system cost.
Your installer will ask you to sign a Small-scale Technology Certificate Assignment Form, transferring ownership of the STCs to them in exchange for the upfront discount.
You pay the discounted price on your invoice. The installer handles CEC registration and STC claiming — you don't need to do anything else. There's no paperwork to submit to the government.
Who Is Eligible
✅ Eligible
- Australian homeowners
- Renters (with landlord permission)
- Businesses (systems under 100kW)
- Systems using CEC-approved products
- Installed by a CEC-accredited installer
❌ Not eligible
- Systems over 100kW (use Large-scale RECs)
- Non-CEC-accredited installers
- Systems already installed (retrospective claims)
- Battery-only installations
- Installations after 31 December 2030
Victorian homeowners can combine the federal STC discount with up to $1,400 in state solar rebate and $8,800 in interest-free battery loans — potentially making solar near-free upfront.