Car Battery Voltage Too High- Introduction And Causes

Nobody loves an overachiever, and car parts are no exception. The battery is the car's second most essential component, yet it can be too energetic at times. Your car battery voltage might be excessively high, just like when you overcharge your phone. Your battery and vehicle may be harmed by high voltage. 

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Checking and maintaining it will guarantee that it lasts as long as possible and that it does not cause harm to the rest of your engine. Maintenance can potentially extend its life cycle. But what if you discover a flaw? If the voltage on your car battery is too high, you need to tend to it immediately.

If you eagerly want to know what can cause the high voltage on a car battery or Is 15v too high for a car battery, If so, then you have landed on the right page. Just keep reading on!!

Car Battery Voltage Too High When Running

A fully charged battery will generally display between 12.6 and 12.8 volts on a voltmeter. If the voltage on your voltmeter is between 12.4 and 12.8, your battery is in good health. But if the voltage is more than 12.9 volts, it is a sign that your battery has excessive voltage, which can be a daunting situation for you. 

To know what causes the high voltage on car batteries, then scroll below. 

What causes the high voltage on car battery?

A number of factors might cause a high voltage in your battery. Have a look at some of the factors. 

1) Loose Connections

The voltage of your battery might fluctuate due to a simple problem of loose wires and connections. Because loose connections impede the flow of electricity, your battery may be improperly charged or discharged. Your car may struggle to start, or your headlights may be too dim as a result of a loose connector. Your auto starter won't be able to ignite the initial spark plug if it doesn't have enough electricity. Get your voltmeter out if your car is having trouble starting. It's possible that you're dealing with a high-voltage issue.

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Here Are a Few Points to Look Into:

●The solenoid for the starter

●All wires are leading to and from the alternator and battery if they are corroded.

You may fix them yourself if you have the necessary equipment and skills, or you can hire a professional to be safe.

2) Alternator Problems

The alternator can also cause high voltage. The purpose of an alternator is to convert mechanical energy into electricity. When the alternator fails, the energy distribution is incorrectly transformed. The symptoms of an alternator are similar to those of a loose connector. Your electrical systems will struggle to turn on and stay on. Other signs include difficulty with your turning signals blinking at a fast rate, the car having trouble staying on, and your lights dimming. 

Hearing a deep growl emanating from your hood is the most unsettling symptom. This isn't an issue that can be solved by just turning up the volume on your radio. Turning on your headlights and revving your motor is an inexpensive way to test your alternator. If your lights are brighter as you rev your engine, your alternator operates, but not adequately enough to keep the brightness consistent.

Fortunately, neither the battery nor the complete alternator needs to be changed. Alternators can be repaired if necessary. There is a simple fix, and the majority of specialists can fix the equipment while you wait.

3) The Starter

Since your starter is directly connected to your alternator, you should double-check this component as well. Even if your connections are OK, the part itself may be damaged. If it is already showing symptoms of wear and tear, it is time to replace it.

Your car's starter influences the battery. A malfunction with the starting might cause problems with the other components that power the battery, such as the alternator.

Do you have trouble turning the starter unit's key? Remember that using broken or defective parts regularly might cause major issues in your engine over time. When you notice a problem with a part, it's time to repair or replace it.

4) The Battery Itself

To begin, be aware of the dangers of working on a battery; a car battery has the potential to cause you injury. The importance of safety protocols cannot be overstated. You may test a battery in its usual state without turning on the car. If your readings go outside of these parameters, you've located the root of the problem:

●Minimum 12.4V

●Maximum 12.9V

There is the minimal prospect of fixing a battery, and adding liquid will not necessarily assist. In this scenario, you'll have to get a new one. Do you get a hopeless sensation when your car displays signs of trouble? If the problem is with your battery, there are only a few items you can examine for the root of the problem.

Is 15v too high for a car battery?

So, to address your question, Yes, 15 volts is too high. Most car alternators, which generally recharge your battery after every start and give power while the engine is running, are voltage regulated to around 13.8 to 14.0 volts. The battery will only gas somewhat up to this voltage and at normal temperatures. Above this, it will gas more as the voltage rises. This will damage your plates by creating flaking of plate material and decreasing the life of your battery. Gassing is a bad idea.

Please make sure that when we say "gassing," We don't mean "boiling." The breakdown (electrolysis) of water (H2O) in the electrolyte into H2 gas and O2 gas is known as gassing. If the voltage is too high, the plates cannot receive any more charge (i.e., there is no PbSO4 left to be converted, indicating the plates are completely charged). Once the voltage has peaked, a regulated charger will hold it at 13.5 to 13.8 volts to prevent gassing and overcharge, and the current will drop to practical nil in a healthy battery. Overcharging causes gassing, which "uses up" the water in your electrolyte and, in sealed batteries, will quickly destroy the battery.

You may have also observed that the battery began to warm up/heat up. This is another indicator of overcharging, and it is also harmful to the battery owing to plate expansion and warping.

CAUTION: This gas is a highly explosive mixture; therefore, avoid creating any sparks near the battery while it is gassing or for a short time afterward. Explosions caused by batteries are extremely unpleasant and dangerous. Debris and acid will fly in all directions.

Conclusion

That's all! Now you know the causes of high voltage, but we have made sure that you follow certain steps to get this fixed. If still, you are not able to do so, we must ask you to replace the battery or repair it with the help of a mechanic as doing it on your own may be a risky job.