[Nut-upsuser] Help with Elite 800VA usb UPS

[Charles Lepple]

On Jun 16, 2017, at 2:20 AM, Andrea de Lutti <adelutti at gmail.com> wrote:
> Using 'guestimation' (low: -0.866667, high: -1.083333)!
> Initial battery charge undetermined
> Driver failed to start (exit status=1)

The "low" and "high" voltages should correspond to the battery voltage when it is discharged (LB) and charged, respectively. For a 12V (nominal) battery, they should not be less than zero :-)

There is a check for whether the nominal battery voltage is 1, but it should be looking for -1. (This has been fixed in nutdrv_qx, but was not backported to blazer*)

As Manuel suggested, you can use the "defaults.battery.voltage.low" and "defaults.battery.voltage.high" options in ups.conf - there is a bit of a chicken-and-egg problem here, but you can still put in approximate values (say, 10.4 and 13.0) in order to run the calibration, and then adjust them to the actual reported values.