A solar and battery package usually includes rooftop panels, an inverter, a home battery and installation, with the system size matched to your electricity use. Check how much power you use during the day and evening, whether the battery can provide backup during outages, and what the warranties cover. Ask several accredited installers for itemised quotes, including any switchboard or installation costs, and compare the system’s expected output rather than focusing only on the advertised price. Your final savings and payback period will depend on your usage, electricity plan, location and system performance, so consider independent advice and current guidance from energy.gov.au.