Nut upsuser - Jan 2020 - System with MGE UPS shuts down too early

OK. I'll try it, but it really puzzles me how the battery could have 
gone bad for just 15 months. The online power is pretty stable, so the 
battery hasn't gone through many charge/discharge cycles...


Regards,
--
Georgi

On 11.1.2020 at 14:24, Manuel Wolfshant wrote:
>
> indicates that the UPS thought that battery was close to depleted and
decided to shutdown. I suggest to fully retest your battery ( doing a full
charge/discharge cycle with a dummy load ), I suspect it is not any more as good
as you believe it to be.
>
>
> wolfy

On January 11, 2020 3:02:59 PM GMT+02:00, "Georgi D. Sotirov"
<gdsotirov at gmail.com> wrote:
>OK. I'll try it, but it really puzzles me how the battery could have 
>gone bad for just 15 months. The online power is pretty stable, so the 
>battery hasn't gone through many charge/discharge cycles...
It also depends on the actual manufacturing date. If it was stored in a
warehouse long enough before you purchased it...


wolfy

You have a point, but how to check the actual manufacturing date?


Regards,
--
Georgi

On 11.1.2020 at 17:54, Manuel Wolfshant wrote:
> On January 11, 2020 3:02:59 PM GMT+02:00, "Georgi D. Sotirov"
<gdsotirov at gmail.com> wrote:
>> OK. I'll try it, but it really puzzles me how the battery could
have
>> gone bad for just 15 months. The online power is pretty stable, so the
>> battery hasn't gone through many charge/discharge cycles...
> It also depends on the actual manufacturing date. If it was stored in a
warehouse long enough before you purchased it...
>
>
> wolfy

OK, my UPS turned out to be older that I thought. I apparently bought 
and installed it in September 2016 (not 2017 as I initially wrote). That 
makes for over 3 years of work, which is over the life expectancy of the 
batteries, so I ordered new battery pack.

However, how could I make a full charge/discharge test? Should I disable 
SHUTDOWNCMD in upsmon.conf? Or is there any other way to ignore forced 
shutdown? I'd like to see how long it would go until the batteries 
actually drain.


Regards,
--
Georgi

On 12.1.2020 at 12:43, Manuel Wolfshant wrote:
> On January 12, 2020 12:27:38 PM GMT+02:00, "Georgi D. Sotirov"
<gdsotirov at gmail.com> wrote:
>> You have a point, but how to check the actual manufacturing date?
> Some UPSes return this date whem intetogated with upsc
> Otherwise... examine carefully the labels of the UPS
> Regards
> wolfy
>
>>
>> Regards,
>> --
>> Georgi
>>
>> On 11.1.2020 at 17:54, Manuel Wolfshant wrote:
>>> On January 11, 2020 3:02:59 PM GMT+02:00, "Georgi D.
Sotirov"
>> <gdsotirov at gmail.com> wrote:
>>>> OK. I'll try it, but it really puzzles me how the battery
could have
>>>> gone bad for just 15 months. The online power is pretty stable,
so
>> the
>>>> battery hasn't gone through many charge/discharge cycles...
>>> It also depends on the actual manufacturing date. If it was stored
in
>> a warehouse long enough before you purchased it...
>>>
>>> wolfy

On January 24, 2020 6:13:31 PM GMT+02:00, "Georgi D. Sotirov"
<gdsotirov at gmail.com> wrote:
>OK, my UPS turned out to be older that I thought. I apparently bought 
>and installed it in September 2016 (not 2017 as I initially wrote).
>That 
>makes for over 3 years of work, which is over the life expectancy of
>the 
>batteries, 
Good batteries can last 4-5 years. The chinese ones available in most shops last
cca 2 years.
I use Panasonic (ordered from SOS Electronic) and they last 3-4 years. Even
more.
>so I ordered new battery pack.
>
>However, how could I make a full charge/discharge test? Should I
>disable 
>SHUTDOWNCMD in upsmon.conf? Or is there any other way to ignore forced 
>shutdown? I'd like to see how long it would go until the batteries 
>actually drain.
>
Disconnect the computer from the UPS, connect a dummy load (like 2-3 * 100W
tungsten light bulbs) , turn off the nut client on the computer. Start a
stopwatch. Unplug the UPS from mains and wait for it to die. Read the value on
the stopwatch.

wolfy