Réf. : [Nut-upsuser] fake battery.charge on MGE UPS

jerome.lecuivre at mgeups.com jerome.lecuivre at mgeups.com
Fri Sep 9 15:16:09 UTC 2005

Dear NUT user,

You are right concerning the autonomy calculation on Ellipse 650 UPS ("Low End" small Off Line UPS)
=> the estimation is not really accurate (and also a little bit pessimistic)
=> this is a known limitation that was documented on the previous NUT mailing list (before Alioth.org)

MGE will stop soon the production of these models and will sell Protection Center and new Ellipse models
We made some progress on the autonomy calculation for the new models "Protection Center
and new Ellipse"

You will find also a more accurate autonomy calculation for the Line-Interactive models (Pulsar Evolution)
or Online models (Pulsar Extreme C)

Did you contact through http://www.mgeups.com/contacts/europe.htm#Russie ?
Best Regards
Jérôme Lecuivre
R&D Software Project Leader

Jablonovsky Alexander <sasha at cit-saratov.ru>@lists.alioth.debian.org le 07/09/2005 15:57:01

Envoyé par :      nut-upsuser-bounces at lists.alioth.debian.org

Pour : nut-upsuser at lists.alioth.debian.org
cc :

Objet :     [Nut-upsuser] fake battery.charge on MGE UPS

I'm sorry about a wrong place to address, because my problem most likely
is in a hardware, not the NUT software. I had tried to contact the MGE
support team, but got no answer.

I have purchased the MGE Ellipse 650 UPS, and after testing it with the
Linux/NUT package (v. 2.0, mge-shut driver) found out that the
battery.charge indicator and related things (battery.lifetime, low
battery signal) don't function properly. Replacing the unit did not help.

After switching the UPS on battery.charge ALWAYS shows 85%, unrelated of
real battery status. Then, in the ON LINE state this variable slowly
counts up, and in the ON BATTERY state counts down (more faster). That's
all! If the battery have REALLY fully charged, the battery.charge
reaches 30% and triggers the LOW BATTERY signal in ~20 min, reaches 0%
in ~30 min, but the UPS can provide power, for example, above 1 hour.
If the battery have ran down before, the UPS can drop power after 2 min
on battery run with battery.charge=78% and without LOW BATTERY warning!
Sorry, but I want to have a UPS with battery monitoring, not a clock
with alarm! This behavior makes the computer interface and software
totally useless (except for the OL/OB status)!

With best regards,
Jabonovsky Alexander, the system administrator

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