[Nut-upsuser] [Eaton ex-MGE Ellipse ASR] Disable automatic battery test

[Patrick Agrain]

Hi Arnaud, Arjen

Thanks for pointing this.
Indeed, using upsrw to lower the threshold was our 'Plan B' in case that 
the disabling of the automatic was not possible.

@Arnaud : history is a neverending story ;-). Please, could you confirm 
(with your support people ) that this test can not be disabled ?

Thanks in advance to all.
Best regards,
Patrick Agrain

Arjen de Korte a écrit :
> Citeren Arnaud Quette <aquette.dev at gmail.com>:
>
>> the only thing I can see (apart from changing for a more feature full 
>> unit)
>> is to lower the trigger level from 30 % to 20 % so that these tests 
>> do no
>> result in a shutdown. If the software is still NUT, you can simply 
>> change
>> the low battery level using "lowbatt=value" in ups.conf
>
> Note that the above only works if you're using the 'mge-shut' or 
> 'mge-utalk' drivers. If you're using the 'newmge-shut' or 'usbhid-ups' 
> driver, you might try if the UPS allows setting this value by using 
> 'upsrw' to change the value of 'battery.charge.low'.
>
> Having said that, a UPS that triggers a low-battery warning during a 
> weekly test is suspect of having a faulty battery. A weekly test runs 
> the UPS on battery for only a handful seconds (typically 5-10 
> seconds). If it can't keep up that long without triggering a 
> low-battery warning, it most certainly won't have enough capacity left 
> for a clean shutdown of the attached systems if the power really 
> fails. So either the battery is worn out or the load on the UPS is too 
> high.
>
> Best regards, Arjen