A solar battery can cost from several thousand dollars to more than $20,000 installed, depending on its usable capacity, brand, installation work and whether backup power is included. Government incentives may reduce the upfront price for eligible households, but the amount and eligibility depend on current rules and your circumstances. Ask a Clean Energy Council-accredited installer for itemised quotes, including warranties and any switchboard upgrades. Comparing the battery’s expected savings with your electricity use and feed-in tariff can help you judge whether it is worthwhile.