Solar Inverters

Solar PV system stopped working

Solar PV system stopped working, contact us we can help with all issues on solar PV electricity generating system repairs and maintenance.

We aim with some simple questions about your system to be able diagnose the system problem for you and offer a cost effective solution.

t) 01509 341971


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Fronius Symo 20.0-3-M Insulation RISO fault

Twycross – Fronius Symo 20.0-3-M insulation RISO fault

The Fronius Symo 20.0-3-M insulation RISO fault on the Solar PV system was quickly identified as rat damage to DC cables on the array.


104 Renesola JC245M-24-Bb panels were removed where each string was carefully checked and repaired as required before mechanical protection was installed to protect from further attacks.

All debris from the roof was removed from under the arrays before the system was reinstated.

Renesola JC245M-24-Bb Panels
Fronius Symo 20.0-3-M fault

Once complete all string cables were again tested in both dry and wet conditions.


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Replacement Solar PV Total Generation Meter

Warwick –Replacement Solar PV

Total Generation Meter

Replace faulty Elster A100C solar PV total generation meter for a new Landis & Gyr E110

including paperwork for registration of new meter with Feed In Tariff provider.

Elster A100
Landis & Gyr...

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Mastervolt XS Fault Code HW Fail 3

Tipton – Wolverhampton – Mastervolt XS fault code HW FAIL 3

Mastervolt XS was reported with a fault code HW FAIL 3.

Attended site and carried out preliminary inspection.

The inverter was found to have been located in an unsuitable location within an enclosure in full sun.

Mastervolt inverter mounted on south facing external wall in cabinet

This probably contributed to its early failure due to the build up of excessive heat in a poorly ventilated enclosure.

The inverter was found to be beyond economical repair.

The inverter was replaced with a SMA Sunny Boy SB2.5-1VL-40 complete with on board wifi monitoring and relocated to a cooler...

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Fronius IG TL error state 447

Court House Green - Coventry – Fronius IG TL ERROR state 447


System reported as intermittent fault.

After an initial inspection an insulation resistance fault was located on the array DC wiring.

A second visit would be required to remove panels and investigate further.

Severe damage was found to DC cables on roof which was repaired with the array reinstated.

Fronius IG TL error state 447

Fronius IG TL error state 447

Poor workmanship also contributed to the insulation resistance fault due...

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Samil Power Solar River 4000TL-D

Bingham – Nottingham – Samil Power Solar River 4000TL-D

Samil Power Solar River 4000TL-D

Samil Power Solar River 4000TL-D inverter reported to have failed, no yield from system.

System thoroughly checked and tested, no fault could be found.

Inverter re-started and was found to be working ok.

System left in working...

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Solar PV system and inverter Maintenance

Over January we have looked back on some of the solar PV system and inverter maintenance work we have been doing, so the following blogs are a few of the inverter maintenance and maintenance or installation cases we have dealt with since the Summer which we thought you may find interesting........

  • Blackfordby – Swadlincote - SMA Sunny Boy SB1500
  • Radcliffe on Trent - Nottingham –  Fronius IGTL
  • Radcliffe on Trent – Nottingham – SMA Sunny Boy SB2500HF-30
  • Hamilton – Leicester – Power One PVI-3.6-OUTD error E031
  • Court House Green - Coventry – Fronius IG TL error state 447
  • Tipton – Wolverhampton – Mastervolt XS fault code HW FAIL 3
  • Hinckley – Growatt 3000MTL - service visit
  • Walsall – Mastervolt XS4300 showing INSULATION fault
  • Long Eaton – Nottingham – Schuco/Sunny Boy...

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Power One PVI3.6 OUTD solar inverter fault in Tamworth

One of our clients recently reported a potential solar inverter fault which meant that the mains supply to their solar inverter would intermittently trip. This had reached the stage where the main RCD would not reset unless the Solar PV inverter was switched off. The client also reported that their solar PV system was underperforming when compared to their neighbour’s equivalent system on a similar pitch and elevation.

How we diagnosed and fixed this suspected solar inverter fault

Power One PVI3.6 OUTD Solar Inverter Tripping Mains Supply

We attended the site to carry out earth leakage current checks on the side of the consumer unit which was protected by a 30mA RCD which supplied the Power One PVI3.6 Solar Inverter. The leakage current was monitored with all circuits other than the inverter supply connected. ...

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Ratby – Trannergy PVI4000TL Solar Inverter

We recently had a call from a client in Ratby, Leicestershire, reporting that one string of a dual string inverter would trip the Trannergy PVI4000TL solar Inverter when isolated. C Gascoigne visited the site and the system was checked and no solar PV fault was found.  However, as part of the system check we did discover a faulty main RCD which was was located on the house consumer unit which would not trip under any circumstances. This could have left the customer and his property in danger if left unattended.  The RCD unit was replaced from stock on the day and the site left safe once again.  This is an excellent example of why testing should be carried out at regular intervals on all Solar PV systems. If you would like to book...

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SolarEdge certified Inverter Installation and maintenance

We are delighted to announce C Gascoigne Ltd  are now  SolarEdge Certified Installers offering SolarEdge inverter installation and maintenance services.

If you are to experience any problems with your Solar Edge inverter or inverters, optimizers or power boxes, get in touch with our team of solar PV

As SolarEdge certified installers we can install, replace, fix or repair, speaking to SolarEdge on your behalf ; checking if your system is under warranty and coordinating the repair process  as easily as possible for you. We can do this on all SolarEdge systems in place of your original installer.

Contact us via telephone on 01509 341971 or via e-mail or visit our contact page here

You can be confident we...

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