If you only have 50Ah, yet the car thinks it is 90Ah, it will not charge properly. It may, in fact, be over-charging at times.


The E70 charging system is too cute by half- I would return it to stock: AGM, 12 V, IBS in the right place.... system coded accurately to the battery installed.


Edit: Ive seen some hackery in my time, but this one is...wow...something!