SRES Australia-wide

SRES STC Calculator

Review and compare the number of Small-scale Technology Certificates (STCs) eligible for approved products on the CER Register of solar water heaters.

How to use: Find your product on the CER Register of solar water heaters. Note the 10-year STC zone rating for your zone, enter it below, and this calculator adjusts for the current deeming period.

Location Zone

Used to confirm you are reading the correct zone column on the CER Register.

10-Year Zone STC Rating (from CER Register)

The STC figure listed on the CER Register for your selected zone.

Install Year

Number of Units

STC Spot Price ($/STC)

Current spot price varies. Check the STC spot price market for latest figure.

Enter the 10-year STC zone rating to see results.

About the SRES deeming period: The Small-scale Renewable Energy Scheme ends on 31 December 2030. STCs are assigned based on the number of years remaining in the scheme from the install date. The 10-year rating on the CER Register is scaled proportionally.

Formula: STCs = floor(10-year zone rating × deeming period / 10)

This calculator provides an estimate only. Always verify against the CER Register and current STC prices before making commercial decisions.

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