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

Patrick Agrain patrick.agrain at alcatel-lucent.com
Tue Oct 12 08:29:17 UTC 2010

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

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