Alternator voltage output/Battery charge voltage

SonicVQ

It isn't the original battery, but a same size/capacity replacement installed in late 2016.

I agree that typical battery voltages with the engine running is 13.6 - 14.4.
However, in our case the FSM in CHG section, shows the regulated output voltage is 14.1 - 14.7 volts
and the adjustment range of the variable control is 11.4 - 15.6 V.


I don't know how accurate the reported voltage is as it is from my OBDLink scanner.

It could easily be off 0.1 - 0.3 volts depending on the accuracy of the analog to digital converter and the tolerance of the resistors in the voltage divider. (The chip can only measure 0-5 volts and uses a voltage divisor to drop the 12-14v to below 5 volts)

For me, I'm not going to worry about the charging voltage. It was interesting seeing/plotting exactly what it is doing over time.
Well, interesting to me