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Alternators have a built in regulator that keeps the voltage at about 13.5 Volts. Depending on the load, the alternator may be putting out anywhere from just a few amps to full capacity of over 100 amps for some alternators. Batteries charge at anything over 12 volts and handle about 14 volts without any problem. You start causing problems for your battery and other parts of your electrical system when the voltage goes over about 15 volts. But then, if your regulator is working right that should never happen.
The current (amps) of an alternator does not vary. if it is a 100 amp alternator, the amperage coming out is always 100 amps.
What else can I help you with?
What makes a battery and alternator over charge?
faulty voltage regulator
Will a car start if the alternator is going out?
It will start if there is enough charge in the battery to turn the engine over. However if the alternator is weak then the battery will not be charged fully.
What cause alternator not to produce power to start engine?
The alternator produces power to charge the battery. The battery powers the starter to turn the engine over.
What does a battery charge?
A battery charges nothing it accepts a charge from the alternator.
Can a car battery over charge it self in the car?
Sure, if the alternator voltage regulator is defective it can overcharge the battery.
How can I test my alternator to see if it is discharging my battery?
You can have the alternator tested free of charge at just about any major auto parts store. By the way, a bad alternator will not "discharge" a battery - the alternator's function is to provide the charge to the battery. If the alternator is faulty, then it is not providing the charge necessary to keep other components from discharging the battery. I had the alternator tested and it was charging. If the alternator has a bad diode, it will discharge the battery. I replaced the alternator and everything is fine.
What is the purpose of the alternator?
Charge the battery.
Are there any devices that can charge up a car battery besides an alternator?
older cars had a generator ,not an alternator, but you can always use a battery charger to charge a battery
Dodge avenger battery dead?
Charge it, replace it,test the alternator,Charge it, replace it,test the alternator,
ECU for a 1999 Kia Sephia?
put in new alternator but it will not charge battery. alternator was tested and found to be good. why wont it charge the battery?
What should you do if battery was not charged before installing new alternator?
My advice is to charge the battery with a battery charger before starting the engine. You will be putting a heavy load on the alternator if you allow it to charge a dead battery. This could damage the alternator.
Can an alternator charge a car battery?
That is the purpose of an alternator. The keep the battery charged and to run all the electrics on the vehicle. However it is never a good idea to allow the alternator to charge a dead battery. This will put a strain on the alternator and may damage it.
