Can the NUT server perform calibration test?

[ismikes]

Can the UPS NUT server be made to perform the "Battery runtime calibration" procedure?

[macgaver]

Great idea, I will add this to the roadmap. NUT do support this

[macgaver]

We have seen that we have daily calibration happening on our APC UPS without having any code change. We only have APC UPS here, I understand they come pre-configured to self calibrate with some internal schedule.

Question for you: Is it required for another UPS vendor ? Or is it about configuring that internal schedule inside the UPS

[ismikes]

Huh... When I was using this UPS on a Windows 11 system the software had a button to perform the test and when the test ran the software would cut the wall power to the UPS and then gauge how the battery performed as it ran down to about 20% remaining power. Then it restored wall power and returned it to normal service. Is that what your APC is doing for calibration?

The UPS I am using is the Amazon Basics UPS Model: ABST600 which is actually manufactured for them by Cyber Power Systems. On Amazon the description block is "Amazon Basics UPS Battery Backup & Surge Protector, 600VA/360W, 8 Outlets, Standby Uninterruptible Power Supply, Power Outage Protection, Compact Design, Black"

[macgaver]

It is a forced calibration, but by default the UPS is doing this daily. We use a smart power bar and we can see every day that the UPS stop consuming power for 3-5 seconds, they have default configuration and this is caused by internal schedule of the calibration. They are indeed all APC so maybe other vendors are not doing it. We did look at the documentation and using manual calibration is recommended after a battery change. So it is a good idea to implement.

Stay tuned