Mine shows 14.1v right now, I've seen it as high as 14.3v. For the record the TSB was never applied to my car and I don't think its necessary. If you apply it, the charge voltage is raised to about 14.6-14.7v and basically they are charging the battery harder all the time. I don't believe yours was applied and since your battery is new it may be starting out with a higher charge right now, see what happens in a few days, it might settle closer to 14v. Anyway what does the TSB do?
a) it increases the SOC of the 12v battery making it last longer when using accessories before it dies. Sometimes people leave things on or leave items plugged into the ports which may have been responsible for draining the 12v battery.
b) it decreases the life of the battery since its being charged harder all the time.
The 12v battery in this car doesn't need to do much (no engine cranking), all it needs to do is close the contacts to enable the HVB for you to drive off.
I have not had any issues with my 12v battery dying except for once when I forgot the parking lights on in the winter time.
Edited by rbort, 12 May 2015 - 06:48 AM.