In 2026, the cost of a home solar system in Australia depends mainly on its size, panel and inverter quality, roof access, location and whether you add a battery. As a broad guide, a standard grid-connected system may cost several thousand dollars installed, while a system with battery storage can cost considerably more. The advertised price may already reflect incentives such as Small-scale Technology Certificates (STCs), but eligibility and the value applied depend on the system and installation details. Compare several quotes from accredited installers and check current information through energy.gov.au before deciding.