During the party of an unexpected emergency condition, the solar system will continue to supply energy through daylight hrs. Soon after sunset, the battery will back up usage. Then, the battery will be refilled by your system the next day and will be able to repeat that procedure as desired. https://residentialsolarinstallationcalifornia.finance.blog/2024/10/18/4-ways-commercial-solar-contractors-help-their-customers/