In 2026, the federal Small-scale Renewable Energy Scheme may provide Small-scale Technology Certificates (STCs) for eligible solar PV systems up to 100 kW, subject to technical and installation requirements. The number of STCs depends on the system’s rated capacity, location, installation year and the applicable deeming period, while their dollar value varies with the market and installer arrangement. Your installer may apply the STC value as an upfront discount, but the final amount is not guaranteed. State rebates, distributor rules and export limits can also affect the suitable system size, so check the official energy.gov.au guidance and your electricity distributor.