Start by comparing local installers with relevant electrical and battery-storage experience, and check their reviews, warranties and Clean Energy Council accreditation. Ask for itemised quotes covering the battery, installation, switchboard work, monitoring and any ongoing fees, rather than comparing battery prices alone. The right battery size depends on your electricity use, solar generation, tariff and household goals, so an installer should explain the assumptions behind its recommendation. Rebates and loans vary by state and circumstances, so confirm current details through your state government or energy.gov.au before signing a contract.