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Solax Power Hybrid Inverter Faults and Repairs

Founded in 2010, Solax launched it's first solar inverters for the UK market in 2015. 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 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.

All Solar Inverter Faults and Repairs

Solar Power System Repairs

Repair Solax Power Hybrid Inverter

Solax Power Hybrid Inverter LED Indicators:

  • Green Light - The green LED indicates that the inverter is operating correctly.

  • Blue Light - The blue LED indicates whether the battery is charging or discharging.

  • Yellow Light - The yellow LED indicates the inverter's communications status.

  • Red Light - The red LED indicates that the inverter has detected a fault condition. A fault description will appear on the display.

Solax Power 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 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, we will always be pleased to talk you through the process over the telephone at no charge.

  • SPI Fault - SPI communication fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • SCI Fault - SCI communication fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • CAN1 Fault - CAN communication fault - This is a communications error between the inverter and the batteries. Shutdown the system, disconnect and reconnect the communications cable and restart. If this condition persists then contact us.

  • PVConfig Fault - PV Connection Setting Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • Inv EEPROM Fault - Inverter EEPROM fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • Relay Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • Sample Fault - Detection circuit fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • RCD Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • Fan1 Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • Fan2 Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • AC HCT Fault - AC current sensor fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • OverLoad Fault - Overload in Emergency Power Supply (EPS) mode - The power attempting to be drawn from the batteries when in EPS mode (i.e. when no grid connection is present) is greater than the inverter can handle. In the first instance switch off the device that is drawing the power and press 'ESC' on the inverter to reset. If this fault persists after a safe shutdown and restart or if EPS mode isn't enabled then contact us.

  • EPS OCP Fault - Over Current in Emergency Power Supply (EPS) mode - The current (amps) attempting to be drawn from the batteries when in EPS mode (i.e. when no grid connection is present) is greater than the inverter can handle. In the first instance switch off the device that is drawing the power and press 'ESC' on the inverter to reset. If this fault persists after a safe shutdown and restart or if EPS mode isn't enabled then contact us.

  • DCI Device Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • EPS Relay Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • TZ Protect Fault - Over current Fault - This could be a temporary condition which will clear itself when normal conditions return. If the condition doesn't clear then this is likely an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • Grid Lost Fault - The 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'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.

  • Grid Volt Fault - Grid Voltage out of range - The inverter is measuring a grid (mains) voltage that is either too high or too low in relation to the parameters that the inverter has been set to safely operate within. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the inverter supply circuit or with the grid.

  • Grid Freq Fault - Grid frequency out of range - The inverter is measuring a grid (mains) frequency that is either too high or too low in relation to the parameters that the inverter has been set to safely operate within. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the inverter supply circuit or with the grid.

  • PLL Lost Fault - The inverter is measuring unusual grid (mains) conditions. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the inverter supply circuit or with the grid.

  • Bus Volt Fault - Bus voltage out of normal range - 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 panels or with the inverter. We would advise that the DC side of the system is disconnected using either the built in DC isolator at the bottom of the inverter or the DC Isolator installed between the panels and the inverter (if available) and contact us to test the DC side of the system including and excluding the inverter.

  • AC5M Volt Fault - Grid Voltage out of range for the last 5 minutes - The inverter has measured a grid (mains) voltage that is either too high or too low in relation to the parameters that the 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'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.

  • AC10M Volt Fault - Grid Voltage out of range for the last 10 minutes - The inverter has measured a grid (mains) voltage that is either too high or too low in relation to the parameters that the 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'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.

  • Inv OCP Fault - Inverter over current protection fault - The inverter is measuring current above an acceptable limit. This fault may clear itself but if it persists and after the system has been safely shutdown and restarted then contact us.

  • PV Volt Fault - There is an issue with the voltage from the panel side of the system. This could mean either a problem with the panels or with the inverter. We would advise that the DC side of the system is disconnected using either the built in DC isolator at the bottom of the inverter or the DC Isolator installed between the panels and the inverter (if available) and contact us to test the DC side of the system including and excluding the inverter.

  • Isolation Fault - This error is generated when during normal operation of the inverter, a leakage current to ground/earth is detected on the DC/PV side of the system. Earth / Ground Faults (also called Iso or Isolation Faults) often present themselves when it is raining or at times of high humidity when moisture can enter the system. These faults often clear when conditions improve but they will not get better by themselves, potentially becoming more dangerous over time. We would advise that you book an Engineers visit in order to carry out a full system test, identify the source and rectify the fault.

  • Temp Over Fault - The inverter is too hot. This could be due to a number of factors, for example 1) If the inverter is exposed to direct sunlight 2) If the inverter has been installed without adequate ventilation around the chassis which would allow excess heat to dissipate 3) The inverters 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.

  • Fan1 Speed Fault - Fan speed outside of the normal range - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • Fan2 Speed Fault - Fan speed outside of the normal range - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 CAN Fault - This is a communications error between the inverter and the batteries. Shutdown the system, disconnect and reconnect the communications cable and restart. If this condition persists then contact us.

  • C1 Temp High - The integrated battery charger is too hot. This could be due to a number of factors, for example 1) If the inverter is exposed to direct sunlight 2) If the inverter has been installed without adequate ventilation around the chassis which would allow excess heat to dissipate 3) The inverters 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.

  • C1 Fan Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 TZ Fault - Over current Fault - This could be a temporary condition which will clear itself when normal conditions return. If the condition doesn't clear then this is likely an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 EEPROM Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 HCT1 Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 HCT2 Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 Bus OVP - Over voltage Fault - This could be a temporary condition which will clear itself when normal conditions return. If the condition doesn't clear then this is likely an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 Temp Low - The temperature of the integrated battery charger is too low, this is most likely due to low environmental temperatures. If the operating temperature is within range and after a safe shutdown and restart the condition persists then contact us

  • C1 Boost OVP - Over voltage fault - This could be a temporary condition which will clear itself when normal conditions return. If the condition doesn't clear then this is likely an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 Bat OVP - Battery over voltage fault - This could be a temporary condition which will clear itself when normal conditions return. If the condition doesn't clear then this is likely an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 Charger OCP - Over current fault - This could be a temporary condition which will clear itself when normal conditions return. If the condition doesn't clear then this is likely an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 Bus OVP - Over voltage fault - This could be a temporary condition which will clear itself when normal conditions return. If the condition doesn't clear then this is likely an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 Boost OCP - Over current fault - This could be a temporary condition which will clear itself when normal conditions return. If the condition doesn't clear then this is likely an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • CT Fault - This is a communications error between the 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.

  • RC Fault - DCI over current protection fault - This could be a temporary condition which will clear itself when normal conditions return. If the condition doesn't clear then this is likely an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • DCI OCP Fault - DCI over current protection fault - This could be a temporary condition which will clear itself when normal conditions return. If the condition doesn't clear then this is likely an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • Other device fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • SW OCP Fault - An Over current fault has been detected by software - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • DM9000 Fault - Network DSP fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • RTC Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • Mgr EEPROM Fault - Manager EEPROM fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • Mgr CAN Fault - Manager CAN fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 SPI Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

  • C1 Sample Fault - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

Solar Power System Repairs

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Solar Inverter Recycling: - Recycling Solax Hybrid Inverters

Solax 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 Solax Hybrid inverter, we will be pleased to help you recycle it.

Solar Power System Repairs

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Solar Power System Testing, Servicing & Maintenance

Regular solar PV system testing, servicing and maintenance will extend the life of a 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 panels, cables, 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.

Solar Power System Testing, Servicing & Maintenance

 

Solar PV Inverter Replacement

If you have a faulty inverter, we offer an efficient, value for money, hassle free 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 the new unit's serial number and confirm the warranty details with the manufacturer.

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

Many modern 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.

Solar PV Inverter Replacement

 

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.

Mains/Grid Isolation and Surge Protection

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Articles: Further Information, Calculators & 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.

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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.

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What Our Customers Say:

"Glen replaced our inverter. Excellent honest guy. We wouldn’t deal with anyone else highly recommended." Nicola Moger, Devizes

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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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Areas Served:

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, Andover, Banbury, Basingstoke, Bath, Berkshire, Bicester, Blunsdon, Box, Bracknell, Bradford on Avon, Bristol, Burford, Calne, Camberley, Carterton, Cheltenham, Chippenham, Chipping Norton, Chipping Sodbury, Cirencester, Corsham, Cricklade, Devizes, Didcot, Evesham, Faringdon, Fleet, Gloucester, Gloucestershire, Hampshire, Henley-on-Thames, Highclere, Highworth, Hook, Hungerford, Keynsham, Kingsclere, Lambourn, Lechlade, Lyneham, Maidenhead, Malmesbury, Marlborough, Marshfield, Melksham, Minety, Newbury, Oxford, Oxfordshire, Pewsey, Purton, Ramsbury, Reading, Royal Wootton Bassett, Salisbury, Shalbourne, Slough, Stow, Swindon, Tewkesbury, Thatcham, Trowbridge, Wanborough, Wantage, Warminster, Wiltshire, Winchester, Windsor, Witney, Wokingham, Worcester, Wroughton and Yate.

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