We have an APC UPS 1500 which frequently trims due to reported extended over voltage issues.
The help files tell me that to work around this I need to set the Upper Voltage to the highest setting and set the sensitivity to low.
Sensitivity is set at low already.
High transfer Voltage 253
Low transfer voltage 208
and nominal voltage 230
I see I can set the upper voltage to 267 would there be any reason not to do this?