Why do we need the Volt gauge?

A voltmeter is a useful tool for detecting whether the generator and battery in a car are faulty. It allows car owners to monitor the voltage levels in the electrical or charging system, and detect any abnormalities before they become serious issues. The original warning countermeasures for an abnormal power system in a car is only the charging light, but it only lights up when the power is almost exhausted. Therefore, many car owners may not be aware of any issues until it's too late. By using a voltmeter, car owners can monitor the voltage levels in real-time and identify any abnormality in the power system.

In modern cars, the power system plays a crucial role in the normal operation of the vehicle, and a fault in the power system can cause serious issues. If the voltage value of the generator on the car is below 12.5V and continues for a long time, it means that the generator is about to fail, and the engine may be using battery power. Once the battery power is exhausted, the engine may turn off or not start smoothly the next time. Therefore, it is recommended that car owners install a voltmeter in their vehicles or use a portable voltmeter to check the voltage levels regularly.