With the popularity of cars, cars have become a part of our lives, and we spend more and more time in cars. At the same time, more and more things can be handled in the car: office, watching movies, playing computer, using car appliances, and even cooking. … The use of these household appliances in the car is inseparable from the vehicle inverter. However, there are many car inverter brands on the market, especially in the case that most owners do not understand the functions and parameters of the inverter, it is more unrealistic for them to understand the inverter brand. Here we mainly explain the functions and detailed parameters of the vehicle inverter, so that you can recognize your needs and choose the right inverter products and brands.

1, What is vehicle inverter?
Vehicle inverter is a device that can convert 12V or 24V (truck) direct current (DC) electricity from the car to 220V (110V European standard) alternating current (AC), which is the same as the mains electricity, for household appliances. With it, the owner can use the inverter to connect the battery to drive the electrical appliances and various tools to work, which can greatly expand the entertainment and work scope that can be carried out in the car.

2, choose what power vehicle inverter suitable?
According to the required range of electrical load, basically all on-board electrical products are marked with their required power, for example, the on-board refrigerator is marked with 150W, and the inverter should choose products above 150W. If the car uses multiple electrical loads at the same time, then we need to add the power used by all the electrical negatives, and then choose a vehicle inverter that is larger than its combined power.

3, choose the modified wave inverter or the pure wave inverter?
Sine wave inverters can provide AC power of the same quality as mains power and can drive any kind of load, but the technical requirements and costs are high. Repair sine wave inverter can meet most of our electricity needs, high efficiency, low noise, moderate price, so become the mainstream products in the market, repair sine wave inverter should avoid “ Inductive load” . In popular terms, that is, the application of electromagnetic induction principle of high-power electrical products, such as motors, compressors, relays, fluorescent lamps and so on. This type of product requires a starting current that is much larger than the current required to maintain normal operation (about 5-7 times). A refrigerator that consumes about 150 watts in normal operation can have a starting power of more than 1,000 watts. Simply put, if you need electrical equipment with high current start, you need to choose pure sine wave inverter.

4, What is continuous power? What is peak power?
The power marked on the vehicle inverter product has sustained power and peak power, sustained power is the actual power of the inverter, also known as rated power, peak power refers to the inverter after loading the load electrical equipment, in the instant can provide starting power. Many products on the market are labeled by peak power. For such products, consumers will have problems after purchasing the nominal 150W, which can only drive electrical equipment within 100. For example, the big brands on the market are marked according to the actual power, and there is no such means to deceive consumers to achieve marketing purposes. Therefore, consumers must ask clearly when buying inverter products, how much the actual power of the product is, or will be cheated after purchase.

5, conversion efficiency of vehicle inverter
Conversion efficiency is a very important indicator of the vehicle inverter, the higher the inverter efficiency, the longer the battery time, the smaller the heat of the vehicle inverter, the conversion efficiency is the ratio of output wattage and input wattage, if the number is closer to 1, the better the efficiency is displayed, in terms of inverters, the general efficiency is about 80%-90%, that is, the input 100W. Output at 80W-90W, the inverter itself consumes nearly 10W-20W of power. Conversion efficiency is divided into no-load and full-load. No-load loss means constant loss. It is independent of the current passing through, but is related to the voltage to which the component is subjected. When the load is not added, the components in the inverter are operating at the lowest power, which is usually understood as the energy consumption when the load is not loaded. This efficiency can generally be as high as more than 90%, but when doing a full load, the conversion efficiency can reach 85% is a good product. Three brands and some for the purpose of sales promotion will advertise that the product conversion efficiency is as high as 95%, they use the way to replace the column with no-load efficiency to mark, so that consumers mistakenly think that this is the full load conversion rate of the inverter. The owner can make a simple judgment from the heat of the inverter by carrying a high-power load, the greater the heat, the greater the energy loss, and the lower the corresponding conversion efficiency.

6, intelligent protection function of vehicle inverter
A good vehicle inverter should have perfect protection functions to protect your car and power under various circumstances. It should also have an audible and visual alarm function to remind you to deal with various situations in a timely manner. Generally, the protection function should be input undervoltage (low voltage) protection, overvoltage protection, over-temperature protection, output overload, output overcurrent, output short-circuit protection.
Undervoltage protection: vehicle inverter provides electrical safety protection device, it has an intelligent anti-low voltage device built in, in the case of abnormal low voltage input, it will intelligently start the internal protection device to ensure the front-end battery, inverter, and back-end electrical safety. The low voltage protection relay in the inverter is connected to both ends of the power supply, and when the input voltage is lower than a certain value of the allowed access voltage, it will automatically trip to separate the circuit breaker switch. This function mainly allows the car battery to have enough voltage for the car engine to start after the car stops running.
Overload protection: overload protection equipment installed to prevent the main power line from overheating and damaging the protector due to overload. Overload is a broad term that can refer to excessive load on electrical equipment or excessive force on objects. On these beyond "; Load" The protection made by the behavior is collectively referred to as overload protection. In the power supply system, the function of automatically disconnecting the power supply device due to excessive load is called overload protection.
Overcurrent protection: When the electrical equipment exceeds the maximum output current of the vehicle inverter, the function of automatically disconnecting the power supply device due to excessive current is called overcurrent protection. This function is mainly to protect the car circuit, prevent damage to the car circuit due to high current output, and shadow safety accidents.
High voltage protection: the inverter provides electrical safety protection device, it has an intelligent anti-high voltage device built in, in the event of an instantaneous high voltage input anomaly, it will intelligently start the internal protection device to ensure the power safety of the inverter and back-end electrical appliances.
Overtemperature protection: When the maximum operating temperature of the inverter is exceeded, the inverter automatically breaks off and interrupts the work to ensure the safety of electricity consumption.
Short circuit protection: The protection function of vehicle inverter due to short circuit of electrical equipment.

7, vehicle inverter shell material and heat dissipation mode
On the market, low-power (within 150W) vehicle inverter housing materials are basically made of aluminum alloy and PP fire-resistant plastics, and PP fire-resistant retrograde materials can withstand high temperatures of more than 150 ° C without deformation. 150W power, if the vehicle inverter does not use inferior components, in theory, it does not need to use a fan for heat dissipation, just natural cooling. But in fact, many low-power vehicle inverters on the market are equipped with fans for active heat dissipation, in this paper the conversion efficiency of vehicle inverters, the greater the heat, the greater the energy loss, the lower the corresponding conversion efficiency, the electronic components used in the inverter that goes without saying.

The cooling fan used by the regular brand of vehicle inverters is intelligent, and the normal condition must be that the inverter will start when it has an electrical load and reaches a certain temperature.

8, vehicle inverter input and output interface

Commonly used vehicle inverters generally have two kinds of power access interfaces, one is a small power, power within 200W, through the vehicle cigarette interface, the other is a high-power direct wire connected to the car battery to access electricity.
The vehicle inverter can provide AC (AC) socket, USB charging interface, cigarette lighter interface, 5V-12VDC interface, the type of interface and the number of interfaces provided, the corresponding cost performance will be higher.

  9, monitoring and sound and light alarm device
High-end vehicle inverters generally provide LCD displays, so that owners can timely understand the battery voltage, output voltage and current. In addition, some vehicle inverters also provide status lights and peak alarms, so that the owner can understand the operating status in time.

10, how much power car inverter suitable
Because the car circuit has a maximum allowable current value in the design process, the maximum power output of most cars through the cigarette lighter interface is generally not more than 200W, so the inverter power input through the vehicle cigarette lighter interface is not recommended to exceed 200W. If you need to use high-power electrical equipment, you need to buy the kind of inverter connected to the battery. The high-power inverter must be started when the car engine is working. Most of the power emitted by the internal generator of the car generally does not exceed 600W, for the installation of more than 600W power inverter, if the inverter is working for a long time, because the electricity is higher than the charging speed of the battery with the car generator. That would cause the battery to lose power. If you often do this, it is best to change the car's own generator to a larger one.

11, whether it is produced by regular manufacturers, whether it meets the 3C standard
Products produced by regular manufacturers will have registered trademarks, this is traceable, printed in the package or accessories with the manufacturer's address and telephone, if not, you can basically determine three no products. At the same time, the regular manufacturers provide more comprehensive after-sales and technical support. There are many domestic products, a bunch of foreign language, but even trademarks, manufacturers have no, but also beautiful name imported products, this product is likely to be copycat products, it is best not to buy.
Many products sold in the country are marked with FC, CE, 3C, FC and CE are the certification standards of the United States and the European Union, 3C is the national standard.

12, car inverter choose what brand?
After reading the introduction of the parameters of the vehicle inverter, I believe that the majority of owners now have a certain understanding of the vehicle inverter. Industry insiders often say that because the market demand for car chargers is large, and the manufacturing threshold is low, there are a large number of car inverter brands on the market. Some even belong entirely to “ Three nothing” Products, by virtue of price advantage in the market to gain a place.
A good vehicle inverter brand should have the following four requirements:
1, good ventilation and heat dissipation, workmanship and electronic components must be better;
2, to provide enough electrical output interfaces and interface types;
3, high conversion efficiency, product power mark clearly;
4, provide a variety of intelligent protection.