UPS Charging Even When Turned Off?

[Anonymous user]

Does the batteries inside the UPS continue to charge (after UPS has gone into battery mode) even if it is turned off but is connected or plugged into the AC source? Or does charging only happens if the UPS is turned on?

Thanks

Message was edited by: yanaice13

[TheNotoriousKMP_apc · Accepted solution]

I beleive it depends on the type of UPS. Some of them do charge when not powered on, some do not. Any particular model in mind that we can take a look at for you?

[Anonymous user · Accepted solution]

Say for the ES, CS and RS back-ups series....and the smart ups as well 3KVA below.

[EZ_Button_apc · Accepted solution]

As soon as AC power is sufficient the batteries will charge regardless of if it powered off or on.

[Anonymous user · Accepted solution]

I'm not aware of any UPS where the charger circuit is downstream of the power switch. For the most part, you can assume as long as its plugged in, it will continue to charge.

[BillP · Accepted solution]

Where do I find this "sufficient" AC power? Is it in the spec?

Thanks,E

[Anonymous user]

thanks

[Anonymous user · Accepted solution]

Please advice..(1) i use an APC UPS and i noticed suddenly that after sometime my generator cant power it whenever i powered it, it use to work with the generator before but not anymore.... I assume the battery is down... what do i need to do?

(2) Will the battery charge with direct AC source while the UPS is turned off ? i need to know

[BillP · Accepted solution]

Hi,

On 4/10/2016 10:10 AM, Adeleye said:

(2) Will the battery charge with direct AC source while the UPS is turned off ? i need to know

Yes. The UPS will charge when powered off when connected to AC source.

On 4/10/2016 10:10 AM, Adeleye said:

Please advice..(1) i use an APC UPS and i noticed suddenly that after sometime my generator cant power it whenever i powered it, it use to work with the generator before but not anymore.... I assume the battery is down... what do i need to do?

Have you tried to adjust the sensitivity of the UPS? See Knowledge base document FA156514 for assistance. 

[JMKAUTO]

You generator probably producing dirty electricity or incorrect hertz.