Browse FAQs

Why might the LEDs on my Back-UPS or Smart-UPS SC be flashing?
Red Overload LED: on solid APC UPS Selector tool
Why might the Overload LED be lit on my APC Back-UPS?
APC's UPS Sizing Tool model number of your UPS) by using .
Video: Why might my APC Back-UPS Product be beeping?
3.) Capacity Overload - APC's UPS Selector
What are some issues I may encounter when using an APC Back-UPS with a generator?
... for hospitals, are sized large enough and are of good enough quality that any APC UPS will operate fine.
Video: Back-UPS ES - Procedure for Battery Replacement
Cause: The internal batteries contained in APC UPS are shipped disconnected per US DOT requirements.
Video: Connect Battery on Back-UPS RS/NS M2 & MS Series
All APC UPS systems are shipped with batteries disconnected to comply with US DOT regulations.
Back-UPS is detected as an ""Unknown Device"" in Device Manger
... to be changed in order for your PC to recognize the USB device as an APC UPS after each boot.
Equipment connected to a Back-UPS product turns off unexpectedly and/or reboots.
APC UPS single phase models which do output a Pure Sine Wave include:

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