If all the electrical appliances connected to an inverter are not working when there is power available, it could be due to a few possible reasons:
Inverter Switch or Mode: Check if the inverter's switch is turned off or if it is in a mode that prevents the appliances from receiving power when the mains power is available. Some inverters have switches or modes that allow you to choose between using the inverter power or the mains power. Ensure that the switch is in the correct position or the mode is set appropriately.
Faulty Inverter: It's possible that the inverter itself is malfunctioning. There could be an internal issue or a component failure that is preventing it from properly transferring power from the mains to the appliances. In such cases, you may need to have the inverter inspected and repaired by a qualified technician.
Incorrect Wiring or Connections: Verify the wiring and connections between the inverter and the appliances. Ensure that the cables are properly connected, and there are no loose or damaged wires. Faulty or incorrect wiring can disrupt the flow of electricity, preventing the appliances from receiving power.
Overload Protection: Inverters often have built-in overload protection mechanisms to prevent excessive power draw. If the combined power consumption of the appliances exceeds the capacity of the inverter, it may shut off or go into a protective mode. Check if the total power demand from the appliances is within the rated capacity of the inverter.
Battery Issues: Inverters usually rely on batteries to provide power when the mains supply is unavailable. If the batteries are not functioning correctly or are discharged, the inverter may not be able to supply power to the connected appliances, even when the mains power is available. Check the battery charge level and condition.
It is recommended to consult the user manual of your specific inverter and perform basic troubleshooting steps. If the issue persists, it's advisable to seek assistance from a professional electrician or the manufacturer of the inverter for further diagnosis and resolution.