I have one in my rig, Disabled it though. (Actually I have two)
My Xantrex Prosine will alarm atr low battery (I just remembered I have 3) so does my Gas Alarm (propane detector)
I also have a power strip (12 volt kind) from West Mountain Radio (Rig-Runner is the model) and it alarms at low/high voltage.. the problem is GM sets it's voltage regulators too high so it alarmed every time I used a turn signal.
Home is where I park it!