Solar battery storage in Australia can cost from several thousand dollars to more than $20,000 installed, depending on the battery’s usable capacity, brand, inverter requirements and installation complexity. Larger systems generally cost more, but the cheapest option may not provide the best warranty, efficiency or backup capability. Your quote may also be affected by state rebates, loans or other incentives, where available, with eligibility and payment amounts decided by the relevant government program. Compare itemised quotes from accredited installers and check the current information on energy.gov.au before deciding.