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Solis Hybrid Inverter Faults and Repairs

Established in 2005 Ginlong (trading as Solis) have grown to become the third largest solar inverter manufacturer by sales volume in the world. 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 Hybrid 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 inverters and what action to take to resolve them below:

All Solar Inverter Fault Codes, Warnings and Troubleshooting

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Solis Hybrid Inverter Faults and Warnings:

Some of the advice we give related to identifying, confirming and or resolving some of the faults detailed below, starts with safely shutting down and restarting the solar inverter and the solar PV system. This is something that nearly all solar PV systems installed in the UK would have been designed to be carried out safely by the solar PV system owner. However, paperwork, schematics and manuals are not always clear or available, so if you have any concerns about how to do this, Contact us and we will be pleased to talk you through the process over the telephone at no charge.

Solis Hybrid Inverter Fault Codes and Explanations:

* OV-G-V - Over grid voltage - The solar inverter is measuring a grid (mains) voltage that is too high in relation to the parameters that the solar inverter has been set to safely operate within. If this fault persists contact us to arrange for a solar engineer to visit to establish whether the fault lies with the solar inverter, the inverter supply circuit or with the grid.

* UN-G-V - Under grid voltage - The solar inverter is measuring a grid (mains) voltage that is too low in relation to the parameters that the solar inverter has been set to safely operate within. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. See * NO-GRID below. If the situation persists contact us to arrange for a solar engineer to visit to establish whether the fault lies with the solar inverter, the supply circuit or with the grid.

* OV-G-F - Over grid frequency - The solar inverter is measuring a grid (mains) frequency that is too high in relation to the parameters that the solar inverter has been set to safely operate within. If this fault persists contact us to arrange for a solar engineer to visit to establish whether the fault lies with the solar inverter or with the grid.

* UN-G-F - Under grid frequency - The solar inverter is measuring a grid (mains) frequency that is too low in relation to the parameters that the solar inverter has been set to safely operate within. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. See * NO-GRID below. If the situation persists contact us to arrange for a solar engineer to visit to establish whether the fault lies with the solar inverter, the supply circuit or with the grid.

* NO-GRID - No grid voltage - The solar inverter is not measuring a grid (mains) voltage suggesting that mains power to the unit has been disconnected. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'.

Check fuses, isolators, Miniture Circuit Breakers (MCBs) and Residual Current Devices (RCDs) in and around consumer units, around the solar generation and mains/grid supply meters and see if anything marked 'solar PV' or you can see is related to the solar PV system is switched 'off'. The solar generation meter draws it's power from the mains so if this isn't on, this would be a strong indication that something heading toward the incoming grid/mains power supply has tripped off.

RCD

RCD

 

MCB

MCB

An RCD has a test button and is twice the width or a circuit breaker. An RCD that's switched itself 'off' is an indication that it has picked up an earth fault somewhere on the circuit that it protects, this fault could be anywhere on the circuit and might have been temporary.

- If an RCD has switched itself 'off' it's ok to try to turn it back 'on' again. If you meet with instant and strong resistance to closing the switch, leave it 'off'. If it stays on for a short while and switches off when the solar PV system has warmed up and begun to feed in power, there's most likely a problem with the solar PV system somewhere, leave the RCD turned 'off' and contact us to discuss the next steps.

If the RCD remains on for a few hours, weeks or days and then switches itself off, faults like these are often weather related. Damp cables and wet or windy conditions will often expose faults both physical and in design, with AC and DC cabling, connectors, solar panels and RCDs. Contact us to discuss the next steps.

If the RCD stays on, the solar inverter starts up and everything works fine in all conditions - all good.

- If a circuit breaker has switched 'off' this is an indication of either a short circuit, most likely a serious failure either within the solar inverter or with the solar inverter supply cable. Or for some other reason the circuit breaker has picked up a fault and isolated the circuit to prevent the solar inverter supply cable from becoming overloaded.

Turn on circuit breakers at your own risk, there is the potential to cause damage and only do so when you are able to access and inspect the solar inverter and all isolation equipment whilst it's in operation. If you meet instant and strong resistance, leave the circuit breaker 'off' and turn everything to do with the solar PV system 'off' remembering to also safely isolate the DC circuits.

If the circuit breakers stays on and then switches itself off after a few minutes, this is reasonably strong indication that the solar inverter has a serious internal fault. Turn off everything to do with the solar PV system including the DC isolators and contact us to discuss the next steps.

If the circuit breaker stays on, the solar PV inverter starts up and feeds power into the electrical system through the circuit breaker; although the circuit breaker will continue to protect the circuit, ideally a physical inspection and electrical test of the supply circuit including all isolators, circuit breakers, RCDs and electrical connections would also be carried out.

- Everything's 'on' but the error remains and the solar inverter won't start. If everything on the grid/mains power supply side including the solar generation meter is switched 'on', this would be an indication that there is either an internal fault within the solar inverter or there's a problem with the grid/mains power supply. Contact us to discuss the next steps.

* OV-BUS - Over DC bus voltage - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* UN-BUS - Under DC bus voltage - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* GRID-INTF02 - Grid interference - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* OV-G-I - Over grid current - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* AC Transient Overcurrent - This could be an issue with the backup port wiring or an internal error within the solar inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

* IGBT-OV-I - Over IGBT current - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* DC-INTF - Battery overcurrent - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* IGFOL-F - Grid current tracking fail - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* IG-AD - Grid current sampling fail - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* OV-TEM - The solar inverter is too hot. This could be due to a number of factors, for example 1) If the solar inverter is exposed to direct sunlight 2) If the solar inverter has been installed without adequate ventilation around the chassis which would allow excess heat to dissipate 3) The solar inverter;s components are getting too hot due to an internal component fault. If the unit isn't running hot and if after the system has been safely shutdown and restarted this condition persists then contact us.

* INI-FAULT - Initialization system fault - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* OV-IgTr - Grid Transient Overcurrent - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* OV-Vbatt-H - Battery Hardware Overvoltage - Check if the battery is correctly connected or the battery contactor is disconnected, Restart the battery, Restart the solar inverter, if the fault still exists contact us.

* OV-ILLC - LLC Hardware Overcurrent - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* OV-Vbatt - Battery Overvoltage - Assuming that this is an existing installation that has been specified correctly, hasn't recently been changed or added to and has operated before without problems. This could mean either a problem with the batteries or more likely the solar inverter. Restart the solar inverter and restart the batteries, if the fault persists contact us.

* UN-Vbatt - Battery Undervoltage - Assuming that this is an existing installation that has been specified correctly, hasn't recently been changed or added to and has operated before without problems. This could mean either a problem with the batteries or the solar inverter. Restart the solar inverter and restart the batteries, if the fault persists contact us.

* DSP-B-FAULT - Comm. failure between main and slave DSP - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* NO-Battery - Check that the battery is connected correctly, restart the batteries, restart the solar inverter, if the fault persists contact us.

* OV-Vbackup - Inverting Overvoltage - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* Over-Load - Overload in backup mode - The power attempting to be drawn from the batteries when in backup mode (i.e. when no grid connection is present) is greater than the solar inverter can handle. In the first instance switch off the device that is drawing the power and restart the solar inverter. If this fault persists after a safe shutdown and restart or if EPS mode isn't enabled then contact us.

* CT-Fail - This is a communications error between the solar inverter and the mains with the CT clamp. Shutdown the system, disconnect and reconnect the CT clamp and restart. If this condition persists then contact us.

* MET_Comm_FAIL - This is a communications error between the solar inverter and the mains with the CT clamp/meter. Shutdown the system, disconnect and reconnect the CT clamp/meter and restart. If this condition persists then contact us.

* CAN_Comm_FAIL - CAN communication fault - This is a communications error between the solar inverter and the batteries. Shutdown the system, disconnect and reconnect the communications cable and restart. If this condition persists then contact us.

* DSP_Comm_FAIL - If after the system has been safely shutdown and restarted this condition persists the inverter has a fatal error and should be replaced. There are a few ways that we can help with this: Solar Inverter Replacement

* Alarm-BMS - The solar inverter has picked up that the batteries management system alarm has been activated. Restart the batteries and if the condition persists then contact us.

* BatName-FAIL - Wrong Battery Model - This is an error code that would only be expected to be seen on initial configuration. If after the system has been safely shutdown and restarted this condition persists then contact us.

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Solar Inverter Recycling: - Recycling Solis (Ginlong) Hybrid Inverters

Solis Hybrid inverters contain valuable materials such as copper and aluminium, these materials are in high demand and recycling them is significantly less energy intensive than extracting them from ore.

If you find yourself with a damaged or faulty Solis Hybrid inverter, we will be pleased to help you recycle it.

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Solar Power System Testing, Servicing & Maintenance

Regular solar PV system testing, servicing and maintenance will extend the life of your solar PV system and ensure that solar panels are always operating safely and at their best, whilst maximising yields.

We offer complete safety and performance testing for solar PV power systems of any size. Includes solar panels, cables, solar inverters, isolators and mains connections.

We provide solar power system testing and maintenance services for residential, commercial, industrial and agricultural clients across Southern, South West England and the West Midlands, with specialist experience working with farmers, developers and commercial and industrial buildings owners.

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Solar PV Inverter Replacement

If you have a faulty solar inverter, we offer an efficient, value for money, hassle free solar inverter replacement service. We offer good advice and install quality equipment with comprehensive warranty and support options. We will test the rest of the system as part of the service, take care of all hardware deliveries, record your new unit's serial number and confirm the warranty details with the manufacturer.

Our solar electricians work cleanly and will dispose of any unwanted boxes, faulty equipment and packaging.

Many modern solar inverters can now use wireless home networks to transmit solar generation data to PCs, tablets and smartphones, so if you would like something like this, let us know and we will be happy to set it up as part of the installation.

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Mains/Grid Isolation and Surge Protection

Mains/AC Surge Protection Solar PV Systems

A whole house surge protector is installed to provide protection from transient overvoltages originating from the mains/grid. A whole house surge protector is installed directly inline and as close as possible to the incoming mains/grid supply meter, this allows for surge protection for all circuits and equipment including solar inverters, routers, stereos and other sensitive electrical equipment within the network. The addition of a 100Amp lockable isolator also allows for safe and convenient isolation of all electrical equipment within the network including consumer units, solar inverters, battery storage units and EV chargers from the mains/grid in one place.

Surge protectors are in compliance with the recently updated 18th edition amendment 2 of BS7671.

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Articles: Further Information, Calculators & Solar Inverter Fault Codes

Lots of articles, calculators and technical information including links for further reading. Covering a range of topics related to the installation and maintenance of solar photovoltaic and electrical systems in the UK.

/Solar PV Information Articles

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.

How to provide power to a house using a portable generator

We look at changeover switches, the importance of earthing, generator loadings, isolating non essential loads. Where to locate the generator and how best to safely isolate the grid/mains power supply and switch to a generator supply.

Solis Inverter Faults and Repairs

Solis 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 inverters and what action to take to resolve them.

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What Our Customers Say:

"We had been let down by a failure on our system,and the manufacturer of the part was no longer trading. We called Glen during the afternoon and he was there in the evening. He examined the system and recommended a replacement manufacterer, promising to come back and fit in the new part once it arrived. We informed Glen of the arrival on a Friday PM, he was there fitting the new part by 10:30 on the following Monday. Of course it worked. That is what you call service, and guess who is looking after all our requirements in the future. Highly recommend this company." - Gill Spencer, Newbury

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Case Studies

We've carried out Solar PV System design, installation, testing, repair and maintenance work on solar PV systems of all shapes and sizes all across the UK.

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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:

Swindon: Abingdon, Aldbourne, Amesbury, Andover, Banbury, Basingstoke, Bath, Berkshire, Bicester, Blunsdon, Box, Bracknell, Bradford on Avon, Bridgwater, Bristol, Buckingham, Burford, Burnham on Sea, Calne, Camberley, Cardiff, Carterton, Cheltenham, Chippenham, Chipping Norton, Chipping Sodbury, Cirencester, Corsham, Cricklade, Devizes, Didcot, Evesham, Eynsham, Faringdon, Frome, Fleet, Glastonbury, Gloucester, Gloucestershire, Hampshire, Henley-on-Thames, Highclere, Highworth, Hook, Hungerford, Keynsham, Kingsclere, Lambourn, Lechlade, Ledbury, Ludgershall, Lyneham, Maidenhead, Malmesbury, Marlborough, Marshfield, Melksham, Minety, Newbury, Newport, Oxford, Oxfordshire, Pewsey, Purton, Ramsbury, Reading, Ross on Wye, Royal Wootton Bassett, Salisbury, Shaftesbury, Shalbourne, Slough, Southampton, Stow, Stratford upon Avon, Stroud, Swindon, Tewkesbury, Thatcham, Tidworth, Trowbridge, Wanborough, Wantage, Warminster, Weston Super Mare, Wiltshire, Winchester, Windsor, Witney, Wokingham, Worcester, Wroughton and Yate.

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