First of all, you should pay attention to the specifications, because the electrical equipment with different power needs to use the inverter of different specifications. Therefore, it is necessary to know which appliances to use in the selection. Otherwise, buy a 40W inverter, but find that a car appliance needs 100W power supply, and startup is a problem. In addition to buy car inverter, to confirm various protective functions of inverter, because car power itself is unstable, the inverter does not provide protection function, when electrical appliances connected inverter, it would be easy to fall on electrical appliances. Generally speaking, the vehicle inverter is divided into two types according to the waveform of the output current, one is the square wave converter and the other is the sine wave converter. Because the power supply of the square wave inverter is unstable, the ac current of the output is poor, and its load capacity is poor, which is only 40-60% of the rated load, which may damage the electrical appliances used. So samasora suggests that you buy a pure sinusoidal inverter or modify the sinusoidal inverter. Car modified sine wave inverter is called quasi sine wave inverter, because of its waveform is close to sine wave, can be used in mobile phones, laptops, televisions, cameras, CD machine, all kinds of chargers, car refrigerator, game consoles, DVD players, etc.
It is important to note that the pure sine wave inverter and modified sine wave inverter is different, the price of the pure sine wave inverter belongs to high-end products, modified sine wave inverter are low-end products. It has become a mainstream product in the market because of the high efficiency, low noise and price of the sine wave inverter. Finally, when choosing the vehicle power inverter, we should pay attention to the efficiency of conversion. Like most electronic products, there is a conversion efficiency in the vehicle inverter, which is between 70 and 80 percent of the common inverter conversion efficiencies in the general market.