Small-scale technology certificates (STCs) are an Australian Government incentive that can reduce the upfront cost of an eligible solar panel system. The potential discount depends on factors including the system’s size, location, installation date, remaining deeming period and the market value of STCs, so it is not a fixed rebate. An accredited installer usually creates and assigns the certificates on your behalf, with the expected value commonly applied as an upfront discount. Check the Clean Energy Regulator’s guidance and ask your installer to explain the calculation and any assumptions in the quote.