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      01-22-2013, 08:18 AM   #6
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makkan00's Avatar
United Kingdom

Drives: F10 Sold
Join Date: Dec 2011
Location: Essex

iTrader: (55)

Originally Posted by mistryn View Post
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.