STC rebate calculator
By My Energy Mate Editorial · Last updated
Quick Answer
The federal STC rebate is worth roughly A$1,900 to A$2,300 on a 6.6 kW system installed in a capital city in 2026, falling each year as the deeming period shortens toward 2030. Enter your system size and zone for the exact certificate count and value.
Certificates created
45 STCs
6.6 kW × 1.382 × 5 deeming years, rounded down
Rebate value
A$1,710
Applied as a point-of-sale discount by your installer
Frequently asked questions
What are STCs?
Small-scale Technology Certificates: the federal solar incentive. Each certificate represents 1 MWh of expected generation to 2030 and trades for roughly A$38-40, which your installer claims and passes on as a discount.
Why does the STC rebate shrink every year?
The deeming period runs to the end of 2030, so a 2026 install earns five years of certificates and a 2027 install only four. Installing earlier means a bigger rebate on the same system.
Do I have to claim STCs myself?
No. Practically all installers claim the certificates for you and quote a price with the discount already applied. You sign the assignment paperwork at install time.