Light meaning and fix
APC Back-UPS Red Overload Light: Meaning and Fix
On APC Back-UPS guidance, a solid red Overload LED means connected equipment is drawing more power than the UPS can provide.
On APC Back-UPS guidance, a solid red Overload LED means connected equipment is drawing more power than the UPS can provide.
What it means
The UPS is overloaded and may shut down to protect itself.
Device details
| Device type | UPS battery backup |
|---|---|
| Brand | APC |
| Model | Back-UPS LEDs |
| Light name | Red Overload LED |
| Light location | UPS front panel |
| Color | Red |
| Pattern | Solid |
| Severity | danger |
| Last verified | 2026-05-02 |
What to do first
Move some equipment off the battery backup outlets and reduce the load.
- Turn off or disconnect nonessential equipment.
- Move some devices to surge-only outlets if your UPS has them.
- Check the wattage rating of the UPS.
- Keep total connected load within the UPS rating.
- Restart the UPS after reducing load if needed.
- Contact APC support if overload remains with a light load.
When this can be normal
It can briefly appear during startup with connected equipment, but it should not stay on during normal operation.
When to stop troubleshooting
Stop using the UPS overloaded. Overload can cause shutdown and equipment loss of power.
Parts or products that may help
Only replace parts when the light pattern and official guidance support it. Some lights indicate setup or software states, not broken hardware.
- No replacement part is recommended from this light pattern alone. Troubleshoot the device state first.
FAQ
What does red Overload mean on APC Back-UPS?
Schneider Electric says connected equipment is drawing more power than the UPS can provide.
What should I unplug first?
Unplug nonessential or high-wattage equipment.
Can overload shut the UPS down?
Yes. APC says the UPS may shut down to protect internal circuitry.
This guide is based on: Schneider Electric APC Back-UPS LED FAQ.
Source type: official_support_page. Confidence: verified. Last verified: 2026-05-02.
Overload states can be accompanied by an audible tone.