Check your roof’s condition, available sunlight, shading and orientation before comparing solar panel systems. Ask installers about the system’s expected output, warranties, monitoring, installation accreditation and how it will connect to the grid. The federal Small-scale Renewable Energy Scheme may reduce the upfront price through STCs, but eligibility and the value offered are subject to the scheme and installer arrangements. Compare quotes carefully and confirm any savings estimates with a qualified installer and your electricity retailer.