Nut upsuser - Dec 2018 - MGE EllipseMAX 1500 shuts down after a few hours

I have taken out the batteries and measured them with a multimeter. 
They put out 13V (they are rated 12V 9Ah).
Putting them back again and disconnecting the UPS from the mains it is 
kept on, powering all the connected devices.
The shutdowns only occur when the UPS is being monitored. Are you sure 
it's a battery problem? Do UPS perform further tests when they are 
being polled for data? I'll check with newer batteries then. I bought 
these one year ago :S

En dg., 2 de de des. 2018 a les 11:53 P. M., Charles Lepple 
<clepple at gmail.com> ha escrit:
> On Dec 1, 2018, at 10:08 PM, raul <raulvior.bcn at gmail.com> wrote:
>> 
>>>  Also, given that the load is only 12%, double-check that the UPS 
>>> is not configured for any power saving features that might cause 
>>> the shutdown ("ECO mode" or similar). NUT does not get a 
>>> notification for that event the way that it gets a normal LB 
>>> shutdown notification.
>> 
>>  Are you referring to NUT (ups.conf) or to the UPS itself? I have 
>> checked the instruction manual and it says nothing about ECO modes. 
>> It talks only about disabling alarms or changing sensitivity to 
>> source voltage variations.
>> 
> I was referring to a setting on the UPS (which NUT can change). It 
> would look like this in the upsc output, so I don't think you have it:
> 
> outlet.1.autoswitch.charge.low: 0
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On Dec 2, 2018, at 7:55 PM, raul <raulvior.bcn at gmail.com>
wrote:
> 
> I have taken out the batteries and measured them with a multimeter. They
put out 13V (they are rated 12V 9Ah).
What sort of load did you have in parallel with the multimeter? (This is why
Wolfy mentioned the light bulb: if the battery has developed excessive internal
resistance, it will show proper voltages when tested open-circuit, but will read
lower with a load.)
> Putting them back again and disconnecting the UPS from the mains it is kept
on, powering all the connected devices.
> The shutdowns only occur when the UPS is being monitored. Are you sure
it's a battery problem? Do UPS perform further tests when they are being
polled for data? I'll check with newer batteries then. I bought these one
year ago :S
> 
Hard to say what the UPS firmware does internally - the NUT driver just sends
the standard HID queries at the configured polling rates. The reason why I keep
bringing up potential hardware issues is that MGE was very open with their
standards, and the drivers were extensively tested against hardware from that
era.

You sent some debug output earlier - did that include the point at which the UPS
shut down? If not, that would be useful information.

I have a T1500 G3 from HP, made also by Eaton. When used with the eaton or
hp software under Windows or Linux and USB cable i have frequent lost
communication issues. In the eaton or hp software the unit has a setting
that shuts down the ups in case of comm lost. Maybe you have to address
this area as it looks that you loose comm. I also never tried the com port.

Hope it helps.

On 3 Dec 2018 4:58 am, "Charles Lepple" <clepple at gmail.com>
wrote:

On Dec 2, 2018, at 7:55 PM, raul <raulvior.bcn at gmail.com>
wrote:
>
> I have taken out the batteries and measured them with a multimeter. They
put out 13V (they are rated 12V 9Ah).

What sort of load did you have in parallel with the multimeter? (This is
why Wolfy mentioned the light bulb: if the battery has developed excessive
internal resistance, it will show proper voltages when tested open-circuit,
but will read lower with a load.)

> Putting them back again and disconnecting the UPS from the mains it is
kept on, powering all the connected devices.
> The shutdowns only occur when the UPS is being monitored. Are you sure
it's a battery problem? Do UPS perform further tests when they are being
polled for data? I'll check with newer batteries then. I bought these one
year ago :S
>
Hard to say what the UPS firmware does internally - the NUT driver just
sends the standard HID queries at the configured polling rates. The reason
why I keep bringing up potential hardware issues is that MGE was very open
with their standards, and the drivers were extensively tested against
hardware from that era.

You sent some debug output earlier - did that include the point at which
the UPS shut down? If not, that would be useful information.

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