APC SmartUPS Battery Float Voltage Calibration
Posted by jpluimers on 2023/07/19
For my link archive: [Wayback/Archive] APC SmartUPS Battery Float Voltage Calibration
It is my understanding that older BackUPS units could be adjusted with a potentiometer on the board. Calibration of newer models, and the SmartUPS line is factory set in the unit’s micro-controller. APC is of no assistance with units that are out of warranty. I’ve recently found information of how to recalibrate the battery float voltage through reprogramming the battery gain, and some information about modifying the UPS hardware, described below. I can’t take credit for discovering methods demonstrated, but hope it will be useful to another to have a coherent description.
Via:
- [Archive] Jason P on Twitter: “@MuseumJoe Be sure to check the charge float voltage – it’s often set too high on APC UPSs, and cooks the batteries! “
- [Archive] Joe’s ‘💙 BlueSCSI 💙’ Computer Museum on Twitter: “Let’s play a game of “Guess the problem!” “
–jeroen
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