In 2026, eligible solar water heaters and heat-pump systems may qualify for Small-scale Technology Certificates (STCs), which can reduce the upfront price, but the amount depends on the system, location, installation date and scheme rules. State and territory rebates may also be available, although programmes, funding and eligibility can change. Compare the system’s hot-water capacity, backup heating, roof suitability, electricity use and expected maintenance rather than focusing only on the advertised discount. Check current details with the Clean Energy Regulator, your state government and a licensed installer before signing a contract.