[bmwlover]

Here I did not ask 14.8 is good or not.
Here I asked how to teach to thr car to charge with less than 15v. For example 14.5v to be the maximum.

[____ANGEL___]

We know that car charges agm. With 15v too. This is high for standart battery. (Not for agm) So after replacing we register the new battery but alternator will still charge it with 15v as car do not know that it is standart instead of agm. How can we learn car to charge with maximum 14.3v with ista? This will increase standart batteries life.

You can't with ista. Recharging curve is calculated by some maps stored into the ecu, on many parameters by the ibs, recharging hystogram, actual voltage, actual power request, temperature, etc.... That's why, if you have a bsd alternator, is important to "tell the car" what battery technology and capacity you have installed, so ecu can choose the right charging curve. Only tell "i have a new battery" (registration) is not enough, if you change type from agm to lead acid you have to store this info too.

[bmwlover]

We know that car charges agm. With 15v too. This is high for standart battery. (Not for agm) So after replacing we register the new battery but alternator will still charge it with 15v as car do not know that it is standart instead of agm. How can we learn car to charge with maximum 14.3v with ista? This will increase standart batteries life.

You can't with ista. Recharging curve is calculated by some maps stored into the ecu, on many parameters by the ibs, recharging hystogram, actual voltage, actual power request, temperature, etc.... That's why, if you have a bsd alternator, is important to "tell the car" what battery technology and capacity you have installed, so ecu can choose the right charging curve. Only tell "i have a new battery" (registration) is not enough, if you change type from agm to lead acid you have to store this info too.

Exactly that is what I am saying too and here some people neglects this. Thank you.