Small-scale Technology Certificates (STCs) can reduce the upfront price of an eligible solar system, but the value depends on factors such as system size, location, installation date and the certificate market price. Compare quotes carefully and check whether the advertised discount assumes you assign the STCs to the installer, as well as whether any fees or conditions apply. Use a Clean Energy Council-accredited installer and confirm the system and equipment meet the scheme’s requirements. The Clean Energy Regulator’s website has current eligibility information, while your installer should explain the calculations rather than guaranteeing a particular saving.