[makkan00]

Originally Posted by mistryn

What appears to be the norm for the battery voltage when the car is off and on?

I had a look through the hidden menu -

while the car was off it was around 12/12.1v
while the car was on it was around 14.7/14.8v

does the above seem the norm?
I think I am still on the original battery (4 years), not had any warning lights come up.

I think it also depends on your battery Ah and alternator.

Mine is 14.1-14.3 max when car is running.
And 12-12.4 when car is off.