SUA3000I Battery capacity drops below 25% for no reason.

[BillP]

Our client has a SUA3000I
SN: JS0724024241

Their UPS for some reason drops below 20% battery capacity and there is no indication what has caused this. The input and output voltages seem to be normal. I have gone to site to see if I could find anything wrong with the unit as we replaced the batteries in this unit Jan 2012. I performed a self test and a mains fail test via the serial and both tests show normal operation on both the UPS and batteries side. You can see from the event log I carried out my testing on the 23/10/12. The data log is unfortunatly not long enough to go back on but the batteries seemed to be holding their charge well enough when running on battery. I was just wondering if any1 else has experienced something similar and if there is a fix for this,other then replacing the whole unit.

24.10.2012 06:20:28 UPS: A discharged battery condition no longer exists. 0x0108
24.10.2012 05:51:59 UPS: Passed a self-test. 0x0105
24.10.2012 05:51:51 UPS: The battery power is too low to support the load; if power fails, the UPS will be shut down immediately. 0x0107
23.10.2012 12:13:39 System: Email: Could not mail '192.168.9.250'. 0x001A

24.10.2012 06:00:46 231.8 234.7 233.2 9.36 79.3 50.25 27.0 55.35 22.9 70.8
24.10.2012 05:58:46 230.4 234.7 233.2 9.24 77.3 50.00 26.0 55.35 22.9 70.8
24.10.2012 05:56:46 230.4 231.8 230.4 9.36 76.0 50.00 24.0 55.35 22.9 70.2
24.10.2012 05:54:46 230.4 231.8 230.4 9.36 76.7 50.25 23.0 55.35 22.9 70.2
24.10.2012 05:52:46 230.4 231.8 231.8 9.84 77.3 50.25 21.0 55.35 22.9 74.1
24.10.2012 05:50:46 231.8 233.2 231.8 9.36 76.7 50.00 100.0 55.35 22.9 70.8
24.10.2012 05:48:46 231.8 233.2 230.4 9.36 76.7 50.00 100.0 55.35 22.9 70.2

[BillP]

Sounds like their may be an internal issue with the UPS(such as the charger?) or the batteries themselves. Were they replaced with APC batteries or a 3rd party?

[BillP · Accepted solution]

3ed party