A:Answer Hi,
Thank you for your inquiry.
For the APC Smart UPS C 1440VA (SMC1500C), at a load of 400 watts, the unit can provide approximately 18 minutes and 18 seconds of backup runtime under typical conditions.
This should give you sufficient time to safely save your work or properly shut down connected equipment during a power outage.
Please note that actual runtime may vary slightly depending on battery condition, environment, and the exact load connected.
Runtime graph: https://www.se.com/us/en/products-runtime-graph/SMC1500C/apc-smartups-c-line-interactive-1440va-tower-120v-8x-nema-515r-outlets-smartconnect-port-usb-and-serial-communication-avr-graphic-lcd/
If you have any other questions, feel free to reach out at https://www.se.com/us/en/work/support/.
