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Why is the inverter shutting down?

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Photovoltaics is a technology that uses the sun’s energy to produce electricity. The process of producing energy from solar panels uses an inverter that converts the direct current generated by the solar panels into alternating current, which can be used in households and industry.

One of the problems that users of photovoltaic systems may encounter is the inverter shutting down. Why does the inverter shut down and how to prevent it?

Causes of inverter shutdown

There are several causes of inverter shutdown in photovoltaics, and some of them are:

1. Overloading of the inverter

One of the most common causes of inverter shutdown is overloading. Overloading can occur when the power generated by the solar panels exceeds the maximum power that the inverter can process. In such a situation, the inverter will automatically shut down to avoid overloading.

2. Overheating of the inverter

The inverter in photovoltaics operates at high temperatures, and its components are prone to overheating. Excessive temperature can lead to inverter failure and shutdown. Therefore, it is important to ensure that the inverter is properly cooled by mounting it in a suitable location, such as on a wall shaded from the sun, or by using a suitable cooling system.

3. Solar panel faults

Faults in solar panels, such as damaged connections or defective cells, can lead to inverter malfunction. In such a situation, the inverter will automatically shut down to avoid damage.

4. Inadequate supply voltage

An inadequate supply voltage, such as a voltage that is too low or too high, can lead to the inverter shutting down. Therefore, it is important to ensure an appropriate supply voltage that is within the tolerance range specified by the inverter manufacturer.

5. Protection problems

An inverter in photovoltaics should be equipped with various protections, such as thermal, short-circuit and surge protections. If one of these protections fails, the inverter can shut down to protect against damage to other components.

Does the inverter shut down at night?

The inverter should not shut down at night, as long as it is working properly. At night, when there is no sunlight, the photovoltaic system does not produce energy, and the inverter does not process power, so in principle there is no reason why it should shut down. However, if the inverter malfunctions or malfunctions, the unit may shut down at any time of the day or night. Therefore, it is advisable to regularly monitor the operation of the inverter and perform inspection and maintenance of the device to prevent failures.

How to prevent an inverter from shutting down in a photovoltaic installation?

To prevent the inverter in your photovoltaic installation from shutting down, follow a few steps:

1. Ensure adequate cooling of the inverter

One of the most important things to do to prevent the inverter from shutting down is to ensure that the unit is properly cooled. The inverter operates at high temperatures, and its components are prone to overheating. Therefore, it is important to mount the inverter in a suitable location, such as on a wall shaded from the sun, or use a suitable cooling system, such as fans.

2. Monitor the power generated by solar panels

The most common cause of inverter shutdown in photovoltaics is overload. An overload can occur when the power generated by the solar panels exceeds the maximum power that the inverter can process. Therefore, it is important to monitor the power generated by the solar panels.

3. Perform regular inspections and maintenance on the device

Regular inspection and maintenance of the device is essential to ensure its proper operation. Regularly check the condition of the inverter, wires and connections to make sure everything is working properly. If necessary, repair or replace damaged components.

4. Ensure proper supply voltage

An inadequate supply voltage, such as a voltage that is too low or too high, can lead to the inverter shutting down. Therefore, it is important to ensure an adequate supply voltage that is within the tolerance range specified by the inverter manufacturer.

5. Install additional safety devices

The inverter should be equipped with various protections, such as thermal, short-circuit and overvoltage protection. However, for some installations it may be necessary to install additional protections.

falownik hpt-10000 3f hypontech
Fig. 1 Example of an inverter – a reliable mains inverter from Hypontech

Summary

Inverter shutdown can be a serious problem for users of photovoltaic systems. There are many causes of inverter shutdown, but most of them can be easily prevented by performing regular inspections and maintenance of the device, monitoring the power generated by the solar panels and ensuring that the inverter is properly cooled. If a malfunction occurs, it is advisable to use a specialist to accurately diagnose the problem and repair the device.

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