Battery light on. How to identify alternator model/brand?

[jac]

Hi gents, thanks for the observations. I am learning from you all.

I saw the 13.4 when I first turned on the car and as it idled for a few seconds. That's all I had observed. But now that you guys informed me that 13.4 is on the low end, I have taken the time to observe it further.

So, my observations are:

• Voltage: starts at 13.4 after about 3 seconds from cold start, and while in Park for at least first 30 seconds (not sure if it climbs or stays there if it stays in park for a while)
• Voltage: 13.4 while reversing from park
• Voltage: 13.6/13.7 while driving at around 20 miles per hour
• Voltage: 13.7 while driving at higher speeds than 20 miles/hr

The alternator is a new Bosch 140 amp unit. Well, it is supposed to be new, at least according to FCP Euro. But I am not certain because the box is a retail Bosch box nicely sealed, but the unit has a Bosch sticker, but the plastic part says Valeo... I am reaching out to FCP Euro to check.

Thanks!