Solar panels can reduce the electricity you buy from the grid, but whether they are worthwhile depends on your system cost, household usage, roof suitability, local sunlight and export feed-in rate. The federal Small-scale Renewable Energy Scheme may reduce the upfront price through certificates, subject to eligibility and scheme rules. Using more of your solar power during the day generally improves its value, while a battery may help some households use more energy after sunset. Compare quotes from accredited installers and check current information through the Clean Energy Regulator and your electricity retailer.