When using the inverter, there are five items to be aware of, and the operator must be cautious when using it. First: the DC voltage of the inverter should be the same. Each inverter has a value of DC voltage, such as 12 volts and 24 volts. The battery voltage must be the same as the inverter DC voltage. Your battery is 12 volts then you have to use a 12 volt inverter to convert the AC to use. Second: the output power of the inverter must be greater than the power of the appliance, especially for appliances that are compared when power is turned on, such as refrigerators and air conditioners. Third: the positive and negative poles of the inverter must be connected correctly. The DC voltage linked to the inverter is clearly marked with positive and negative poles, red is positive {+}, black is negative {-}, the battery is also marked with positive and negative poles, and the inverter is connected to the battery when positive. To connect the positive pole, the negative pole should be connected to the negative pole, the connected line must be thick, and the length of the connected line must be seen. Fourth: The inverter must be placed in a well-ventilated, non-humid position, to avoid being wet by the rain, and to have a distance of about 20 cm from the surrounding objects, far from the items that are easy to burn and explode. Place or cover some other items on the inverter, the temperature of the operating environment can not be higher than 40 °C. Fifth: The charging and the inverter cannot be carried out together, that is to say, the inverter cannot be inserted into the electrical circuit of the inverter output when the inverter is in use.