Compare the battery’s usable capacity, power output, warranty, expected lifespan and whether it can provide backup during a blackout. Your potential savings depend on your electricity use, solar exports, tariff, battery size and installation costs, so ask for an independent estimate rather than relying on headline figures. Check whether your switchboard, inverter and home wiring are compatible, and use a licensed electrician or suitably qualified installer. Rebates and loans vary by state and circumstances; check current programs with your state government or energy.gov.au before signing a contract.