Compare the panels’ efficiency, warranty, expected performance and suitability for your roof, rather than choosing on price alone. Ask about the system’s inverter, monitoring, installation workmanship and how much electricity it may generate at your property. A Clean Energy Council-accredited installer can assess your roof, usage, shading and local conditions, then provide a tailored quote. Rebates and feed-in tariffs depend on current rules, your location and provider, so check energy.gov.au and your retailer before making a decision.