Compare at least three itemised quotes, checking the panel and inverter brands, system size, installation method, warranties and any extra switchboard or meter work. The federal Small-scale Renewable Energy Scheme may reduce the upfront price, but eligibility and the value applied are subject to government rules and installer arrangements. Choose a system based on your household’s electricity use and roof, rather than paying for more capacity than you need; a battery can also be considered later. Confirm the installer’s credentials and ask about after-sales support, then compare expected output and long-term value—not just the cheapest quote.