UPS battery alert when self-test

[dnLL]

@andreas-doehler

That is a very common misunderstanding. You should calibrate your UPS in a regular interval (one time per year) to get real runtime results. Without valid calibration, all values shown for runtime are only an estimate.

I refer to the official APC documentation: How do I perform a Battery Calibration on my Smart-UPS? - APC USA. More specifically, this:

Due to increased wear and tear on the battery we recommend performing a calibration no more than once every 6 months (if needed).

I guess it’s up to interpretation what they mean by if needed. For my homelab, I would recommend against it. For production environnements… well, I know we’re not doing the calibration and we have hundreds of APC UPS, maybe this should be reconsidered.

@andreas-doehler

That’s completely correct and now comes the problem. The wording inside the rule is wrong.
The check takes the last diag date (self test) as the time of the last calibration.
If i read the code correct then the rule @mike1098 mentioned is really for the time after an self test and not like the wording suggests for time after calibration.

That’s a real bug @robin.gierse

I just tested it and I can confirm that you are correct. Here is how I set it up:

The wording needs to be adjusted, otherwise it works very well.