Solar STC Rebate Calculator (Australia)
Estimate the federal STC incentive on an Australian solar install from system size, your zone rating, deeming years and the STC price.
- Estimates the federal STC incentive on an Australian solar install.
- Uses your system size, zone rating, deeming years and the STC price as inputs.
- Returns the STC count and an estimated rebate value.
STCs created
45
Estimated rebate
$1,710
Australia's Small-scale Renewable Energy Scheme (SRES) gives eligible solar installs a number of Small-scale Technology Certificates (STCs), usually taken off the price up front:
STCs = system kW × zone rating × deeming years, rounded down to whole certificates.- Zone ratingreflects your region's sunshine and is set by postcode by the Clean Energy Regulator (Zone 1 1.622 → Zone 4 1.185).
- Deeming years count the years left in the scheme: 5 for a 2026 install, falling by one each year until the scheme ends in 2030.
- Rebate =
STCs × STC price. The price floats with the market (capped at $40); installers usually quote a little under that.
Figures reflect 2026 SRES settings — verify the current zone rating and STC price (via the Clean Energy Regulator) when you get a quote.
Estimates only — for guidance, not a quote or engineering specification. Nothing you enter is stored or sent anywhere; the maths runs entirely in your browser.
Frequently asked
- Is this calculator free to use?
- Yes. The STC rebate calculator is free and needs no sign-up. It runs entirely in your browser.
- Is my data stored or sent anywhere?
- No. The calculator runs in your browser and stores nothing. The figures you enter are not saved or sent anywhere.
- How accurate is the estimated rebate value?
- The figure is an estimate based on the system size, zone rating, deeming years and STC price you enter. It is not a quote or a guaranteed rebate amount.
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