The Small-scale Technology Certificate (STC) incentive can reduce the upfront price of an eligible solar installation in 2026. The potential discount depends on your postcode, system size, installation date and the market value of STCs; the deeming period for a 2026 installation generally runs to 2030. Your accredited installer usually applies the discount and handles the certificates, but the final amount is not guaranteed. Check the Clean Energy Regulator’s guidance and obtain a written quote from an accredited installer before proceeding.