After powering the inverter, turn on the switch and connect the inverter to the load indicated above the overload protection power. The inverter will then prepare for overload, indicating protection for overload.
Protection for low voltage happens when the operating voltage is below the rated voltage. For example, after operating for a while, battery power of a 12V inverter decreases to 11V and electric alarm will be alert. You should stop operating some sensitive appliances such as computers. The inverter will stop operating automatically when the operating voltage decreases below 10V if you ignore the alarm.
When operating voltage is above the rated voltage, protection for overvoltage occurs. If a battery is connected to the 12V inverter and operating voltage increases to 15, the inverter will stop operating automatically.
When positive and negative electrodes of the power supply are connected reversely or other situation that causes short circuit occurs, the inverter will prepare for it.
After the inverter operates at full load for a while, increase of the temperature of inverter or environment will lead to the inverter stopping automatically.