Solar panels can reduce grid electricity use, but their value depends on your household consumption, roof suitability, system size, electricity rates and upfront cost. A well-sized system usually provides the greatest benefit when you use more of your solar power during the day, rather than exporting it all to the grid. Eligible systems may receive Small-scale Technology Certificates (STCs), but the value and eligibility depend on current rules and individual circumstances. Compare several quotes from accredited installers and check the latest guidance on energy.gov.au before deciding.