The optimal temperature range for operating solar batteries is between 68ºF and 77ºF (20ºC to 25ºC), which allows them to function at their maximum capacity. Proper indoor storage promotes safety, extends battery lifespan, and follows AS/NZS 5139:2019 guidelines for optimal. Both operating temperature and storage temperature directly impact your battery's performance, safety, and lifespan. But real-world projects in hot deserts or freezing winters push far beyond these limits.