Common Inverter Problems And Their Solutions

An inverter is a pivotal electronic appliance, acting as a backup power unit and supplies electricity during power shutdowns. They let you operate electrical appliances for your typical needs without any interruption.

Like every other electronic appliance, inverters are also prone to malfunctions. When your inverter becomes defective or does not work according to its optimal working condition, do not panic. We have created the perfect guide that will help you troubleshoot your inverter and ensure it runs smoothly.

Inverter not turning on

This is one of the most common problems that people face with their inverters. The typical causes for this are a faulty power switch, tripped inverter, loose terminals of the battery, disconnected battery, and discharged battery.

  • If the power switch of the inverter has become defective, then you will not be able to rectify the problem on your own. You will either have to call a service technician or take it to the store yourself.
  • In case of tripped inverters, press the trip reset button on the device and reset it.
  • In case of loose terminals and a disconnected battery, you will have to clean the rust and reconnect it again.
  • Lastly, charge the discharged battery for a few hours and your inverter is all set.

Blown Fuse

The fuse protects your inverter and other appliances connected to the inverter. However, if there is a power surge or a short circuit happens, the fuse blows. In such cases, the entire inverter becomes inoperable.

Blown fuses cannot be repaired or rectified. The only viable option is to replace the blown fuses with new ones. While replacing the fuses are fairly easy, different models of inverters have fuses installed in different places. Hence, you might have to call a professional if you are unfamiliar with handling electronic appliances.

Battery is not getting charged

This is another common cause of inverters becoming inoperative. Dead batteries are the primary reason for your inverter batteries not getting charged. This problem can also arise due to burnt rectifiers, loose connections, and melted fuses.

If the batteries are dead, then you have no other option other than to replace them with new ones. If the batteries are not dead but still not getting charged, then check for corrosion and rust and clean them. It is very to take proper care of batteries to prevent any issues. 

Shortened backup time

Over time, the power backup of the inverter might get reduced. This can also occur if the power consumption becomes too high. The other common reason could be low levels of distilled water and low charge in the battery

If you have recently bought a new electrical appliance which has caused overload, you will have to remove the extra load. You will have to disconnect an electrical appliance from the inverter to prevent overload. Also, check for distilled water levels and ensure they are maintained between the maximum and minimum levels.

Inverter on bypass mode

When the inverter is in bypass mode, it will supply power to connected appliances only when the mains is present, but stops working once the mains is off. This problem might arise as a result of faulty switches, improper wiring, broken d.c. circuit, or any other internal fault.

Press the power button of the inverter to bring it online. If the inverter does not turn On, then it is advisable to contact a professional to repair the inverter.

Wrong circuit wiring and cable sizing

Choosing the wrong cable size and connecting the wires incorrectly not only causes your inverter to become defective but can also cause a potential fire incident. Additionally, the loose termination of wires can cause a short circuit and cause your inverter to stop working.

Each wire has a different current-carrying capacity and they come color-coded to help you choose them according to your needs. Select the appropriate wires to meet the power demands of your house. The sockets and plugs must also have the capacity to handle the load.

Output overload/Short Circuit

Every inverter comes with a power rating and the maximum capacity to supply load to electrical appliances. If the load becomes too high, it causes overload and shuts down the inverter completely. It can also occur if there is a gap between the phase and neutral of output cables

Ensure that the extra load is removed and the overall load is within the maximum capacity of the inverter. If the issue persists even after that, then disconnect the load from the inverter, change the cables, and then reconnect it.

Alarm beeping continuously

The beeping alarm sound coming from your inverter may be a sign of overload or a stuck cooling fan. Every inverter comes with a fan that prevents the inverter from heating. If the fan is stuck or does not generate enough cooling effect to reduce the temperature, the inverter will raise the alarm. If the issue is not resolved, the inverter will shut down automatically.

As stated above, remove the extra load in case of overload issues. In case, the alarm sound is due to the improper functioning of the fan, you will have to seek a service technician to sort out the issue.

Power inverter LCD displays false codes

In some cases, the LCD screen of your inverter will display false codes. This could be due to a glitch in the internal circuit or external issues such as improper connection of battery cables, the output and input wires.

In such cases, you will have to replace the whole inverter circuit and ensure that battery cables and input and output wires are connected properly to the inverter.

Noise coming out from power inverter

Inverters are generally known to cause a considerable level of noise. However, in certain cases, the noise increases when the fan collects a lot of dust and debris. While this may not cause the inverter to shut down, it will cause inconvenience to your family. If the issue persists, it will reduce the effectiveness of the fan and its cooling effect.

The simplest way is to clean the fan and remove the dust particles and debris. The other option is to replace the fan.

Inverter goes off few moments after power supply is off

In this, the inverter goes into battery mode, once the power supply is off. It will continue to supply load for a short interval of time until the battery is drained completely. After that, the inverter shutdowns completely.

To get rid of this issue, ensure that the battery has high efficiency. If the battery loses its efficiency, it won’t be able to retain a high amount of charge and hence, cannot supply charge for a longer time. Getting a new battery will solve this problem.

Age of an inverter

The average lifespan of a household inverter is 10 years, however, it differs from brand and model. Inverters become more vulnerable to defects and malfunctions as they approach their end of the lifespan. A number of problems can arise frequently one after another.

While it is possible to repair the problems, the best option is to discard it and get a new one. Also, ensuring proper maintenance of the inverter will extend its life span and you can continue using it for a longer time without any problems.

Frequently Asked Questions

1. How can I fix my inverter at home?

It is always advisable to call a qualified technician to fix your inverter. However, you can do basic troubleshooting such as checking if the connections are proper, replacing worn-out wires, and ensuring distilled water level.

2. Why does my inverter keep shutting off?

The primary reason for your inverter to keep shutting off is due to high voltage. Every inverter has a permissible voltage, beyond which, it shuts down for safety reasons.

3. Why is my inverter beeping?

The inverter beeping is a sign that your inverter is handling overload or the inverter temperature is high. Reduce the load and replace your fan to get rid of the beeping sound.

4. Does the inverter fan run all the time?

The inverter fan runs only when the inverter is connected to shore power. If the fan runs all the time, it means your inverter temperature is very high, in which case, you should call a service technician.

5. What is the lifespan of an inverter?

The average lifespan of a household is 10 years. But it can vary depending on the brand, model, and maintenance.


The first thing is to invest in a good inverter and properly maintain it for long-term use. If there is a problem with your inverter, we always recommend you to contact a professional or your vendor. Half knowledge can be dangerous and you will actually end up spending more money if you are not technically savvy in repairing inverters.

We believe that this troubleshooting guide will help you solve all your inverter problems and get it running back in no time. However, if you still need additional support or have any specific queries, please write to us in the comment section. We will be glad to help you out.
If you want to share your tips on troubleshooting, you can do the same by writing in the comment section.