Choose a battery size based on your household’s evening electricity use, solar generation and electricity plan, rather than simply buying the largest system available. Have a Clean Energy Council-accredited installer assess the location, ventilation, fire-safety requirements, switchboard and any export limits before installation. Compare usable capacity, round-trip efficiency, warranty terms, expected cycle life and monitoring features, and ask how the battery will operate during a blackout. Regularly review your energy usage and retailer plan, while following the manufacturer’s maintenance and safety instructions; suitability and costs should be confirmed with a qualified installer.