（1） Normal operation
When the input power is normal, the output power of the inverter is provided by the bypass output of the main input power, and the inverter also needs to charge the battery.
（2） Battery operation
When the main input power is disconnected, the load is powered by the battery inverter. Or when the main input power supply voltage is too high or too low, the inverter will automatically switch to battery power supply in this situation.
Note: Due to the relationship between load power and discharge time, the efficiency of the battery may also be reduced due to low temperature, high temperature, or damage. We can disconnect some of the load to extend the power supply time. When the input power is cut off, the alarm will also sound intermittently. When the battery is discharged to near the critical termination voltage of the battery (END OF DURATION PRE-ALARM), the alarm frequency will increase, and it is best to end all ongoing work at this time. When the main input power continues to cut off, the battery runs out, and the inverter stops supplying power. When the main power supply is restored, the inverter will actively supply power. At the same time, the inverter will automatically charge the battery.
（3） Central processing unit
Control the operation status of the entire inverter.
（4） Battery
Provide backup power for the inverter and select batteries of different capacities based on different backup times.
（5） Inverter
The output part of the inverter converts the DC voltage of the rectifier or the DC voltage of the battery into a stable sine wave AC voltage. Under normal circumstances, the output part of the inverter is powered by a bypass.
（6） Bypass of inverter
Under normal mains power input, the load will be powered by a static bypass switch. At this point, if the main input power fails, the output will be powered by the battery, allowing the load to continue working.