Alternator Charging Too Much ?

[KootaBANG]

I just got my oil changed and was informed that my alternator is charging a little too much and it may cause my battery to wear out faster than normal. I am not very knowledgeable about this, but I was told it's charging around "1501" and supposed to be at "1480" I do not even know what units this is measured in.

My question is.. Is this something to worry about? I paid for a warranty (bought the car from a Hertz dealership) is this something that is covered if I bring in the quote from the Oil Change shop (They also do major repairs) under my warranty?

2013 Chevy Sonic Hatchback LT
1.8L Auto

 

[Papasonic]

Normal automotive alternator charge rates are ~13.8 volts to 14.2 volts with engine at idle and accessories off.
The charge rate may vary greatly depending on battery state of charge, ambient temperature, electrical load, engine RPM etc.
It isn't uncommon to see voltages up to ~15.8 volts for a brief time after start-up in very cold temperatures.
The reading that you were given by the service facility was not necessarily what it is all the time. If it were to operate at that voltage all the time; then you do have a problem. A better diagnosis would be to measure the voltage output over a longer time period under varying conditions.
Measuring alternator output is easily measured with a digital VOM meter placed on the + and - terminals of the battery.
Some owners and forum members have a device plugged into the vehicles data/OBD port under the steering column, and can monitor various functions; charging rate included.
I wouldn't get too excited about the voltage your vehicle exhibited on that one occasion, but would check it numerous times before condemning the charging system.

 

[KootaBANG]

thank you very much!

 

[Papasonic]

thank you very much!

You're welcome.
Papasonic