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Solar Inverter Fault Codes, Warnings and Troubleshooting

Solar inverters can stop working due to the presence of any number of faults. These could be faults within the solar inverter itself or as a result of the solar inverter safely shutting itself down after identifying a discrepancy elsewhere in the system such as from the solar panels, the mains or in the integrity of the wiring.

If the display on the solar inverter (assuming it has one) is still functioning, then the first place to look for a clue as to why the solar PV system isn't working correctly, can be found by looking at the solar inverter's LCD display. Sometimes touching the screen or pressing a button on the solar inverter will iluminate the display. Note any warnings and or fault codes, if possible take pictures of the fault code and a wide picture showing the solar inverter and all the equipment connected to it.

If we have the solar inverter's manufacturer listed, you can find out more about the fault code including an explanation as to what's wrong and the next steps by following the solar inverter manufacturer links below:

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ABB / PowerOne Aurora Solar PV Inverter

ABB / Power One Aurora Inverter Faults and Repairs

Power One, at one point were the second ranked solar inverter manufacturer in the world and there are many Power One Aurora solar inverters installed in the UK. The most popular models being the Uno PVI-3.0-TL-OUTD and the Uno PVI-3.6-TL-OUTD.

Afore Anyhome Solar PV Inverter

Afore Inverter Faults and Repairs

Established in 2010 in Shanghai, China, Afore's 'Anyhome' series of solar inverters began to be installed in the UK from 2012-2013. Popular models include the HNS1500TL, HNS2000TL, HNS2500TL, HNS3000TL and the HNS3600TL.

Fronius IG Solar PV Inverter

Fronius IG / IG Plus Inverter Faults and Repairs

Fronius IG and IG Plus series solar inverters have LCD displays on the front of the chassis that providing it's working, will highlight any errors with the solar inverter or the solar PV system that it runs.

Fronius Primo Solar PV Inverter

Fronius Primo Inverter Faults and Repairs

Fronius Primo solar inverters have LCD displays on the front of the chassis that providing it's working, will highlight any errors with the solar inverter or the solar PV system that it runs, we have listed and described common faults with Fronius Primo solar inverters and what action to take to resolve them.

Growatt AC Coupled Inverter

Growatt AC Coupled Inverter Faults and Repairs

Growatt AC Coupled Battery Storage inverters are supplied with a 10 year manufacturers warranty so even if your initial installer is no longer trading then there is a good chance that if there is found to be a fault with the inverter that it can be repaired/replaced under the manufacturer's warranty.

Growatt Solar PV Inverter

Growatt Inverter Faults and Repairs

Established in 2011 in Shenzen, China, Growatt launched it's first products for the UK market in 2013. Growatt is now one of the top 4 solar inverter manufacturers in the world. The MTL-S Series solar inverters were widely installed in the UK from 2013 through to 2019.

Kaco Powador Solar PV Inverter

Kaco Powador Inverter Faults and Repairs

Kaco New Energy's Powador solar inverters were widely installed in the UK up to 2016. Kaco New Energy was purchased by equipment manufacturing giants Siemans AG in 2019. Popular models included the Powador 2002, the Powerdor 3002 and the Powador 4202.

Kostal Piko Solar PV Inverter

Kostal Piko Inverter Faults and Repairs

Kostal Solar Electric was established in 2006 and is part of the Kostal Group. A family owned business, the Kostal group have been industry pioneers in automotive components for over 100 years. Kostal Solar Electric's development and manufacturing is carried out in Germany and they launched their first single phase 3.0 and 3.6 Piko solar inverters in 2009.

Mastervolt Solar PV Inverter

Mastervolt Inverter Faults and Repairs

Mastervolt Sunmaster and the smaller Soladin ranges of solar inverters were widely installed in the UK between 2011 and 2014. Popular Sunmaster models being the Sunmaster XS2000, Sunmaster XS3200 and the Sunmaster XS4300.

Solar River Solar PV Inverter

Samil Power Inverter Faults and Repairs

Founded in 2008, a fair number of Samilm Power's 'Solar Pond' 'Solar Lake and particularly their 'Solar River' solar inverters were installed in the UK before they ceased trading in 2017. Here we list and describe common faults with Samil Power solar inverters and what action to take to resolve them.

SMA SunnyBoy Solar PV Inverter

SMA Sunnyboy Inverter Faults and Repairs

SMA Sunnyboy solar inverters have been widely installed in the UK, some of the most popular being the SB1200, SB2000 and SB3000. High frequency models include the SB2000HF, SB2500HF, and SB3000HF. Transformerless models include the SB3000TL and the SB3600TL.

SMA Tripower Solar PV Inverter

SMA Tripower Inverter Faults and Repairs

German solar inverter specialists SMA have been a leading manufacturer in renewable energy technologies for the last 35 years. SMA's three phase Tripower Inverters come in a range of power ratings and have been widely installed in the UK for many years, some of the most popular being the transformerless STP-10000TL, STP-12000TL, STP-15000TL and the STP-17000TL.

Sofar Solar Inverter

Sofar Solar Mass Energy Storage Inverter Faults and Repairs

Established in 2013 Sofar Solar launched the ME3000SP Energy Storage Inverter in the UK in 2015. The ME3000SP proved to be a very succesful add on for new systems but proved to be particularly popular with those looking to add energy storage to existing solar PV systems.

SolarEdge Solar Inverter

SolarEdge Inverter and Optimser Faults and Repairs

The SolarEdge system is unique and in our opinion unrivalled in terms of it's ability to monitor system performance down to panel level. This is achieved through the installation of a small unit called an optimiser.

Solarmax Solar Inverter

Solarmax S Series Inverter Faults and Repairs

The Solarmax S Series range of solar PV inverters were manufactured by Swiss company Sputnik Engineering AG. Unfortunately Sputnik Engineering ceased trading in 2014. The Solarmax brand and assets were sold to Renervest, a German photovoltaics company in 2015. The S series range of Solarmax solar inverters was launched and installed in the UK from 2010. Popular models included the 2000S, 3000S and 4200S.

Solax Power Hybrid Solar PV Inverter

Solax Hybrid Inverter Faults and Repairs

Most Solax Power hybrid inverters were provided with a 10 year manufacturer's warranty, so even if the initial installer is no longer trading, if there is found to be a fault with the solar inverter then Solax will cover the cost of a repair/replacement. Popular early UK models of Solax hybrid invertes include the SK-SU3000, SK-SU-3700 and the SK-SU5000.

Solax Power Solar PV Inverter

Solax Inverter Faults and Repairs

Founded in 2010, Solax launched it's first solar inverters for the UK market in 2015. Most Solax Power inverters were provided with a 10 year manufacturer's warranty, so even if the initial installer is no longer trading, if there is found to be a fault with the inverter then Solax will cover the cost of a repair/replacement.

Solis AC Coupled Battery Inverter

Solis AC Coupled Inverter Faults and Repairs

The most popular Solis AC Coupled Battery Storage inverter model in the UK is the RAI-3K-48ES-5G. Solis AC coupled storage inverters have an LCD display on the front of the chassis, which providing it's working, will highlight any errors with the inverter or the batteries that it runs. Here we have listed and described common faults with Solis battery storage inverters and what action to take to resolve them.

Solis Hybrid Solar PV Inverter

Solis Hybrid Inverter Faults and Repairs

Arriving relatively late to the UK, since the launch of their Series 2 (2G) solar inverters to the UK they've since grown from strength to strength, achieving the No1 spot for distributed solar in the UK in 2019. The most popular Solis hybrid inverter models in the UK are the the RHI-3K-48ES-5G, RHI-3.6K-48ES-5G, RH!-4.6K-48ES-5G and the RHI-5K-48ES-5G.

Solis Solar PV Inverter

Solis Inverter Faults and Repairs

Solis solar inverters have an LCD display on the front of the chassis, which providing it's working, will highlight any errors with the solar inverter or the solar PV system that it runs. We have listed and described common faults with Solis solar inverters and what action to take to resolve them.

Sonnen Macht Solar PV Inverter

Sonnen Macht Inverter Faults and Repairs

The problem we often find with Sonnen Macht solar inverters are damaged relays, the tell tale sign of a relay failure is an Error 19: Relay or Error 19: Relay Fault warning displayed on the solar inverter's display.

Trannergy Solar PV Inverter

Trannergy Inverter Faults and Repairs

Founded in 2010 and introduced to the UK in 2012 a fair number of Trannergy's SGN Series solar inverters were installed in the UK up to 2016. Popular models include the SGN1300TL, SGN2300TL, SGN3000TL and the SGN4000TL.

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We are located in Wanborough, very close to Swindon in Wiltshire, Southern England, UK. From here we service clients within a 90 minute driving radius including the towns, cities and regions below:

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