Inverter Repair | Faulty Inverter | Error Code?



By completing this contact form we will tailor-make,
a FULLY INSTALLED, quotation with all prices including VAT.

What should you do if your inverter generates a fault or an error code?

  • First you should check if your inverter is covered under warranty.
  • If your system was commissioned within the last 5 years, then you should contact your original installer.
  • *** PLEASE NOTE *** If your original installer has ceased to trade please contact Green Pulse Energy and we would be pleased to adopt your system and carry out the work for you, liaising with the warranty provider on your behalf.
  • If your inverter is out of warranty, then it will need to be replaced or repaired. Complete the form below to receive a quote from Green Pulse Energy.



Inverter Faults?

Has your inverter failed? Faults in inverters can range from faults which can be resolved very simply to very complicated faults. However, whether it is a simple or complicated fault, both will have a negative effect on production. Has your Generation Meter stopped flashing? Green Pulse Energy deals with this on a daily basis and we have already assisted many clients with our technical advice and our quality expert electrical engineers, help getting your solar panels back to generating the power you are missing.

If you feel you have a faulty inverter or a broken inverter, need your inverter repaired, serviced or replaced then call Green Pulse Energy on 01206 701801 where we would be pleased to be of service. We will investigate your inverter fault and have your grid connection back as quickly as possible.

Faulty installation of the inverters

A possibly obvious, yet very common problem with inverters is that they have been installed incorrectly. This can range from physically misconnecting them to incorrect programming of the inverters. Here the installers’ expertise is very important to ensure correct installation. Correct installation can be checked prior to any handover by carrying out a number of tests, such as:

– Yield test
– Remote activation and deactivation
– Regulation of the reactive power

It is also important to have the delivery (“as-built”) documentation so that the guarantees provided can be properly invoked later, e.g. in the event of a claim.

If you feel you have a faulty inverter or need your inverter checked, call our Service Inverter service team on 01206 701801.


Inverters are made up of electronic components, and therefore sensitive to temperatures. High temperatures will lead to a significant reduction in production, and can even result in a unit stop failsafe if the maximum operating temperature is reached. For example, it is very important that the cabinet or board is on non-combustible material and the building housing the inverter(s) is well ventilated.

It is highly advisable to regularly check the cooling during the operational period and to establish that the cooling or ventilation system is actually operating correctly. In addition to this, a number of steps can be taken in order to prevent excessively high temperatures, such as installing and cleaning dust filters, ensure the area is clear of anything that impedes airflow, etc. Generated electricity creates heat.

If your Inverter is faulty with a heat issue or you are worried how hot the unit casing feels to touch you could have an overheating faulty inverter. If your inverter needs repair or servicing call our Service Inverter service team on 01206 701801

Isolation Fault

Another common problem is the “isolation fault”. This fault occurs as a result of a short-circuit between various parts of the circuit, and the inverter will then report an “isolation alarm”. The short-circuit is usually the result of a combination of moisture and damage to the sleeve on the cabling, faulty installation, poor connection of the DC cables to the panel, or moisture in the connection part of the PV module. This will be more common in areas with high humidity and/or close to the sea.

In the event of an isolation fault, the inverter will stop working completely or continue to work at the minimum “required” isolation level. In the meantime, the inverter is not performing at its maximum capacity. In both cases, production is lost. It is therefore important to ensure that the DC cables are of high quality and correctly installed, i.e. that the cable bushing is watertight. To prevent this problem, it is also important that the correct level of protection (IP) is selected for the inverter cabinet and the inverter building.

Warning! An isolation fault can cause potentially fatal voltages in the conducting parts of the system! Ensure that maintenance is always carried out in accordance with the applicable safety standards.

Inverter does not restart after a grid fault

An inverter must be able to restart itself after a grid fault (if there are no other faults). For example, voltage peaks which occur during sudden deactivation could trigger cut-outs in the system. If the inverter does not restart itself, a service team will then have to come on-site in order to restart the system. This will lead to unnecessary production loss.

It is therefore not just the brand of the inverter that is important, but also the quality of the components used as well as the use of a good 24/7 monitoring system in order to detect faults as quickly as possible. If this is not organised properly, all PV modules connected to the inverter will be unable to deliver power until the fault has been discovered and an engineer has rectified the fault. This is a problem that particularly occurs in areas where the grid connection is not always stable.

The MPPT module

Modern inverters operate on the basis of the MPPT technique. MPPT stands for Maximum Power Point Tracking, and this module has been developed in order to maximise the performance of inverters. Because of the scale of current larger PV systems, multiple rows of PV modules are connected together in series (called “strings”). The strings are then jointly connected to an inverter. However, not all strings produce the same amount of power as a result of many factors such as shading, different positioning, fault in a panel, etc. The strings deliver different voltages, and the difference between the strings in this regard varies continuously. The algorithm in the MMPT module is designed in such a way that the inverter always uses the most optimum supply voltage despite these differences in strings. This always maximises the amount of electricity produced.

It is therefore important that the working order of the MPPT module is established, and that it is working well. This can be done by carrying out a number of performance tests during the start-up of the solar park. Establishing the correct operation of the MPPT module is also necessary in order to be able to make a good comparison between the actual yield and the guaranteed yield according to the manufacturer.


Inverter Error Codes

Need some support for your inverter, give us a call…

01206 701801

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By completing this contact form we will tailor-make,
a FULLY INSTALLED, quotation with all prices including VAT.

Green Pulse Energy Ltd, providing a service you can count on!

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andy millman
andy millman
Malcolm Laquis-Alden
Malcolm Laquis-Alden
Competitive prices, great customer service and a can do attitude, went the extra mile to get my install done before the lockdown. All Staff professional and courteous, fitters also did an excellent job.
Kerry haynes
Kerry haynes
Great company. my battery storage unit wasn't working, phoned them and Gary was very helpful, had it fixed at a cheap price. will definitely recommend to family and friends
leslie cassap
leslie cassap
Mr Hall was exceptionally helpful and conscientious.He was always willing to offer and apply solutions to potential problems based on his experience and knowledge with a most satisfactory installation.
Lorraine Hall
Lorraine Hall
Totally recommend this company, from start to finish excellent work, so happy with everything especially from Mr Stephen Hall

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