STC Calculator 2026
Calculate your solar rebate instantly. See how many STCs (Small-scale Technology Certificates) your system will generate and your estimated savings.
calculateSolar Rebate Calculator
Enter your details to calculate your STC rebate
Your Estimated Solar Rebate
*Estimate only. STC prices fluctuate daily. Final rebate confirmed at installation.
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How the Solar Rebate (STCs) Works
System Installed
You install a CEC-approved solar system with an accredited installer.
STCs Created
Based on system size and location, STCs are created for your system.
Assigned to Installer
You assign STCs to your installer in exchange for an upfront discount.
Rebate Applied
The STC value is deducted from your quote as a point-of-sale discount.
infoWhat are STCs?
Small-scale Technology Certificates (STCs) are the mechanism behind the solar rebate in Australia. They're created when you install an eligible renewable energy system and represent the amount of electricity your system is expected to generate until 2030.
Energy retailers are required to purchase STCs, creating demand that gives them value. When you install solar, you can assign your STCs to your installer in exchange for an upfront discount on your system price.
trending_downWhy the Rebate is Decreasing
The solar rebate decreases each year based on a scheduled deeming period. The formula is:
2026 deeming period: 5 years (down from 6 in 2025). This reduces rebates by approximately 15-20% compared to 2025.
The deeming period decreases annually: 4 years in 2027, 3 in 2028, 2 in 2029, and 1 in 2030. By 2029, the rebate will be about 60% less than 2026. Act now for maximum savings.
STC Zones in Australia
Higher Zone = More STCs = Bigger Rebate
Zones with more sunshine (like Zone 1 in Darwin) generate more STCs per kW of solar installed. This means homes in northern Australia typically receive a larger solar rebate than homes in the south — though the rebate is still significant everywhere.
STC Calculator FAQ
helpHow accurate is this STC calculator?
This calculator provides a close estimate based on standard STC formulas. The actual rebate may vary slightly based on exact installation date, current STC market prices, and system specifications. Your installer will confirm the exact amount.
helpWhat is the current STC price?
STC prices fluctuate based on market supply and demand. Currently, STCs are trading around $38 each. The government sets a ceiling price of $40 but the market rate is typically $35-40.
helpWhen does the solar rebate end?
The STC scheme runs until 2030, but the rebate value decreases each year. By 2029, the rebate will be approximately 75% lower than in 2026. Installing sooner means a larger rebate.
helpCan I claim STCs myself instead of assigning them?
Technically yes, but it's complicated. You'd need to create an account with the Clean Energy Regulator, create the certificates yourself, and find a buyer. Most people assign STCs to their installer for an immediate discount.
helpDo STCs apply to battery installations?
STCs only apply to solar panels, not batteries. However, the separate federal battery rebate (Cheaper Home Batteries) provides approximately 30% off eligible battery systems.
Lock In Your Solar Rebate Today
The solar rebate decreases every year. Get a free quote now and see exactly how much you can save with all available rebates.