If it is running at something less than 14v I would suggest it's not running 100%. The system usually seems to run at a pretty constant 14.2v -14.4 v when all is well and no load (headlights). Keep the display on Volts and check it occasionally, you really don't need to know the time, your total or trip mileage so "volts" is the useful display to show when driving.
The spate of problems with batteries have been exclusively with Exide AGM 12-31 batteries. I would suggest the problem is the battery, not it's environment. Total and quick failure has not been a problem up to now and is limited to Exide batteries. If you are running an Exide AGM 12-31, particularly fitted in the last two years, maybe you are on borrowed time and should replace it?
