Is it normal for battery voltage to fluctuate?
No, it actually typically means that you have a problem with your alternator. Considering this, is it normal for battery voltage to fluctuate? 13.7 V is OK when engine running and alternator putting out charge.
Is it normal for battery voltage to be 14.2v?
By the way, 14.2 V is not too high when charging. That is normal. You said you have a tender. Disconnect your plug from the tender and connect it to a voltmeter instead. That way you can see what your hand-held voltmeter says that the car is doing.
What happens when alternator voltage is below 12V?
You see this phenomena on a car driving at night with wavering yellow headlight levels as they speed up and then slow down constantly. If your alternator output is below 12V at the absolute lowest, then some part of the alternator circuitry is failing and needs to be replaced or repaired.
What should the voltage be on a truck battery?
Truck now has 20k miles or so on it, and works fine. It’ll up the voltage when needed, ie, I have the lights on, stuff like that, but normal daytime driving, it’ll sit anywhere from 12.5–12.8, occasionally jumping up a little higher. Supposedly it saves wear on the battery.
No, it actually typically means that you have a problem with your alternator. Considering this, is it normal for battery voltage to fluctuate? 13.7 V is OK when engine running and alternator putting out charge.
What should the voltage be on a car battery?
The indicated voltage is a function of the battery’s state of charge and loading at the time, and what the car’s electronics are doing to charge the battery. As others have posted, it can go up to 15V or even a bit more. In fact I would worry if the reading did NOT fluctuate over this sort of range!
Why do I get 15 volts when I start my car?
The alternator is not like a light switch as either on or off. What the system is doing is when you first start the engine, the starter has drawn a lot of power out of the battery, the alternator is commanded to run at a higher power to get the battery charged up, that is why you always see 15 volts right after a start.
What should the voltage be on an alternator?
Alternator Testing: What Is The Correct Voltage? For some alternators, it’s normal to see as low as 13 volts. For some, a constant 13.6 volts is an indication of a problem.