Solar panels can reduce the electricity you buy from the grid, but whether they are worthwhile depends on your energy use, roof suitability, system size, local sunlight and electricity rates. Using more of your solar power during the day generally improves the value, while a battery adds cost and may not suit every household. Upfront prices can sometimes be reduced through Small-scale Technology Certificates, subject to the relevant rules and installer arrangements. Compare quotes from accredited installers and check current guidance at energy.gov.au before deciding.