SUA1500I : Changed battery, but runtime hasn't improved

[Anonymous user]

Changed battery yesterday and let it charge overnight. Ran a calibration afterwards, but the runtime is still 7 mins with 7% load (should be around 2hrs i think).

Also my log looks like this now:

09-10-23 15:04:45 Sufficient Runtime Available
09-10-23 15:04:42 Insufficient Runtime Available
09-10-23 15:04:39 Sufficient Runtime Available
09-10-23 15:03:48 Insufficient Runtime Available
09-10-23 15:03:33 Sufficient Runtime Available
09-10-23 15:03:18 Insufficient Runtime Available
09-10-23 15:03:15 Sufficient Runtime Available
09-10-23 15:03:03 Insufficient Runtime Available
09-10-23 15:03:00 Sufficient Runtime Available
09-10-23 15:02:54 Insufficient Runtime Available
09-10-23 15:02:51 Sufficient Runtime Available
09-10-23 15:02:48 Insufficient Runtime Available
09-10-23 15:02:42 Sufficient Runtime Available
09-10-23 15:02:39 Insufficient Runtime Available
09-10-23 15:02:30 Sufficient Runtime Available
09-10-23 15:02:24 Insufficient Runtime Available
09-10-23 15:02:09 Sufficient Runtime Available
09-10-23 15:02:06 Insufficient Runtime Available
09-10-23 15:02:00 Sufficient Runtime Available
09-10-23 15:01:22 Insufficient Runtime Available
09-10-23 15:01:18 Sufficient Runtime Available
09-10-23 15:01:15 Insufficient Runtime Available
09-10-23 15:01:09 Sufficient Runtime Available

Is the UPS broke?

[Anonymous user]

And now I've found out, I have the same problem with my SU3000 RMINET. Load is 25 %, so according to specifications, the runtime should be ~1 hr. PowerChute reports 24 mins after a calibration. The same as it was before i changed the batteries.

Would it be wise to initiate a new calibration?

[BillP]

Hi,

From my past experience the UPS's own internal calibration went nuts due to prolonged bad batteries. Upon replacing your batteries, disconnect any load on the UPS and do a full calibration again, it will take very very long normally to do so and thereafter it will correct the bad calibration data! Hope it helps! 🙂

Cheers,
Pavit

[BillP · Accepted solution]

Actually, when running a calibration, you need at least a 30% load (fluctuating no more than +/- 5%) for an accurate result. Anything less than that and the UPS can't properly determine it's actual available runtime. Since you have 7% load on one unit and 25% load on the other, that's likely part of the issue. Try connecting some more equipment and run another calibration.