Quasi-sine waves are also divided into several types, from square waves that are almost the same as square waves to rounded trapezoidal waves that are closer 

to sine waves. We only discuss the square wave here, which is also the waveform that most of the current commercially available high-frequency inverters can 

provide. This type of quasi-sine wave inverter can be used in notebook computers, televisions, combined audio, video cameras, digital cameras, printers, various 

chargers, handheld brains, game consoles, video disc players, mobile DVDs, home therapy devices And so on, inverters with larger output power can also be 

applied to small electric appliances such as hair dryers, electric cups, kitchen appliances and so on. But for inductive load appliances such as refrigerators, electric 

drills, etc., it is not suitable to use a quasi-sine wave inverter for power supply for a long time. Otherwise, it may cause damage to the inverter and related 

electrical products or shorten the expected service life.

The wire from the car battery to the inverter input carries a very large current. If the quality of the wire is poor, the wire is too thin or the load exceeds the 

standard, the copper wire heats up and eventually catches fire, which will cause a serious accident. Therefore, during the use of the inverter, the operation 

must be carried out in strict accordance with the provisions of the user manual.

Prepare another battery with the same voltage, and connect its positive and negative poles with the positive and negative poles of the original car battery with 

thick enough wires. In this way, the independent use time of the inverter can be greatly extended.

Use electrical appliances below 150W to directly plug the 150W inverter plug into the cigarette lighter socket for use. The inverter over 150W is directly connected 

to the battery through the alligator clip wire, the red wire is connected to the positive electrode of the battery, and the black wire is connected to the negative 

electrode of the battery. The connection should be as short as possible, and the output cable of 220V AC should be longer.

Some electric appliances or tools that use electric motors, such as refrigerators, washing machines, electric drills, etc., require a large amount of current to drive 

them at the moment of starting. Once they are started successfully, only a small amount of current is required to maintain their normal operation. Therefore, 

for the inverter, there is also the concept of continuous output power and peak output power. The continuous output power is the rated output power. 

Generally, the peak output power is twice the rated output power. It must be emphasized that some electrical appliances, such as air conditioners and 

refrigerators, have a starting current equivalent to 3-7 times the normal working current. Therefore, only the inverter that can meet the peak power of 

the electrical appliance can work normally.