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STC Calculator Australia

Estimate your small-scale technology certificates and their dollar value, with zone-aware deeming for your postcode.

Estimated STC value
$10,780
Certificates
276
STC zone
Zone 3 (×1.382)

Estimate only. STC eligibility caps at 100 kW; larger systems earn LGCs. Certificate prices fluctuate.

How STCs are calculated

Small-scale Technology Certificates = eligible kW × your postcode's zone rating × the deeming period (years remaining until the scheme ends in 2030). Their dollar value is the certificate count × the market STC price. Northern (sunnier) zones earn more per kW.

Frequently asked questions

How many STCs will my solar system earn?
STCs = eligible kW (capped at 100 kW) × your postcode zone rating × the deeming period (years to 2030). Use the calculator above for your exact figure.
How much is an STC worth?
STC prices float near the $40 clearing-house cap. The calculator defaults to $39; adjust it under Advanced to match your quote.
What is an STC zone?
Australia is split into four zones by solar irradiance. Sunnier northern zones earn a higher multiplier per kW than cooler southern zones.