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Is it normal for a back UPS too be warm when connected to mains power?

APC UPS for Home and Office Forum

Schneider Electric support forum for our APC offers including Home Office UPS, Surge Protectors, UTS, software and services and associated products designed to share knowledge, installation, and configuration.


Is it normal for a back UPS too be warm when connected to mains power?



I recently bought a BX750MI UPS and the UPS appears to be warm even when it is fully charged and pluged into mains electricity. I do have around 40w of load which is just 10% of the rated capacity.

My ambient temp is always 25-28 degrees.


I've never used an UPS before so is this normal or should I be worried?




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