Start by checking your household’s electricity use, solar generation, evening demand and available installation space. Compare battery capacity, usable capacity, power output, efficiency, warranty terms, expected lifespan, monitoring features and compatibility with your existing inverter. Ask installers about backup power, safety, installation costs, ongoing maintenance, export limits and whether the system suits your switchboard and location. Obtain multiple quotes from accredited installers, check the proposed savings carefully, and confirm any rebates or incentives through the relevant state or territory program and official energy.gov.au information.