In 2026, an eligible solar quote may include an upfront discount from Small-scale Technology Certificates (STCs), with the value depending on your location, system size, installation date and certificate market conditions. The STC deeming period is scheduled to be four years in 2026, so the discount may differ from earlier quotes and is not a guaranteed amount. Ask the installer to itemise the full system price, STC discount, extra charges and final price, and check whether any state or territory program applies. Confirm eligibility with an accredited installer and review current information on energy.gov.au.