Compare the system’s usable battery capacity, solar panel output, inverter size, warranty terms and estimated payback rather than judging packages on price alone. Ask whether the quote includes installation, monitoring, switchboard work, backup power and any ongoing fees, and confirm the installer is appropriately accredited. Government incentives and eligibility rules can change, so check current information on energy.gov.au and ask the installer how any available support has been applied to the quote. Your final savings will depend on factors such as electricity use, tariffs, export limits and the system’s performance.