What is the purpose of the 12V 120W in a car?
2 Answers
The purpose of the 12V 120W in a car is to externally connect electrical devices such as car phones, portable DVDs, and mobile phone chargers. A single socket can provide 12V voltage. It serves as an interface to supply power to electrical devices outside the vehicle, with an output voltage of 12V, while the current varies depending on different vehicle models. The 12V car power source can support electrical devices up to 120W. Additional information about the car power source is as follows: 1. 12V vehicle system: The battery voltage should be around 13V when unloaded, and no less than 11V under load is considered normal. Below this voltage, starting the vehicle may become difficult. 2. 24V vehicle system: The battery voltage should be around 26V when unloaded, and no less than 22V under load is considered normal. Below this voltage, starting the vehicle may become difficult.
Last time I installed a car refrigerator, I researched this parameter. 12V120W means the device requires a 12-volt voltage matching the car battery, with a maximum power consumption of 120 watts. That converts to 10 amps. The car cigarette lighter socket can generally only handle devices up to 150 watts, so when using such a 120-watt appliance, you need to pay attention to three points: First, it's best to start the engine for prolonged use, otherwise the battery might drain, which would be embarrassing; second, don't share the socket with other high-power devices—I once blew a fuse by using an air pump and vacuum cleaner simultaneously; third, try to use dedicated wiring—like my car rice cooker, which is directly connected to the battery, has had no issues for five years.
