Solar King SLK repairs, monitoring and servicing

About The Solar King SLK Inverter Range

The Solar King SLK inverter range has been a popular choice for installation amongst Australian homes and businesses for many years now. Robust and affordable, the Solar King range features models with varying outputs from 1750W all the way to 6500W which include features such as anti-islanding detection and firmware flash capability making them adaptable and ideal for many homes. In most cases, Solar King SLK inverter models come with a five-year guarantee against manufacturing defects and are produced by internationally-owned company Powercom (PCM).

There are five Solar King SLK models:

  • SLK-1500
  • SLK-2000
  • SLK-3000
  • SLK-4000
  • SLK-5000

To view the specifications of each model, click here.

No Utility: there is no AC line

In SLK inverters, a ‘No Utilityits’ fault indicates that your system has lost its AC power connection. It might be worth checking that the main ‘solar supply’ switch in your meter box is on.

Is a No Utility fault covered under warranty or by my insurance?

SLK inverters were installed in Australia up until 2012. They came with a 5-year warranty. Being a ‘plug-and-play’ inverter, if yours is still within the warranty period (which is very unlikely), you can potentially remove the inverter and bring it into your nearest Solargain office, where we will replace it free of charge. Or, if you prefer, you can book a ‘health check’ through Solargain, and we’ll come and replace it for you. As a plug and play system, this will rarely be too complicated.

If your inverter is no longer under warranty, some household insurance policies may cover this type of fault; however, you will need to check directly with your insurer for the specifics.

What’s the best way to resolve a No Utility fault?

Regardless of whether or not your inverter is still under warranty, the easiest way of resolving your SLK inverter’s No Utility fault is to arrange a system ‘health check’ with us. One of our qualified, expert technicians will inspect and service your entire solar power system (something we recommend you have done annually) and will also:

  • Check that there is power to all three phases of our house;
  • Check the working condition of all isolators installed;
  • Check if the AC fuse has blown and replace it if necessary (this incurs a fee of $20 in addition to the price of the health check).

In the event your inverter is deemed irreparable, our Solargain technician can replace your faulty SLK inverter on the spot as they always bring replacement inverters with them. Depending on the size of your system, whether you are on a particular tariff or whether any rewiring is required, our technician will recommend the most suitable replacement based on your circumstances.

To resolve your SLK inverter No Utility fault, contact us today to arrange a solar health check or give us a call on 1300 73 93 55.

Isolation Fault

An isolation fault in your SLK inverter indicates there may be a problem that is isolating the PV panels’ power supply. Before you do anything else, you should check that the main ‘solar supply’ switch in your meter box is on.

Is an isolation fault covered under warranty or by my household insurance?

SLK inverters were installed in Australia up until 2012 and came with a 5-year warranty which by now, would long since have expired. Being a ‘plug-and-play’ unit, if your inverter was installed by Solargain and was still within the warranty period, you can potentially remove it yourself and bring it into your nearest Solargain office, where we will replace it free of charge. That said, an isolation fault may be caused by another issue elsewhere in your installation, in which case, you may be better off booking your whole system in for a health check. However, none of these systems are likely to still be under warranty.

Some insurers do cover this particular fault, but you will need to check your individual policy.

What’s the best way to resolve an isolation fault?

Since an isolation fault can indicate other problems with your overall system, it’s worthwhile contacting us to arrange a health check, to get to the bottom of it. Our technician will check for water in the isolators which is a sign of issues with your installation. They can also replace the AC fuse (which incurs a $20 fee in addition to the cost of the health check). If the AC fuse blows immediately, your inverter unit will need to be entirely replaced. In this case, we can install a suitable replacement on the spot as our technicians always carry replacements with them, taking into account the size of your system, your tariff situation and whether any rewiring will be required.

Contact us online to book a solar health check or speak with one of our customer service representatives on 1300 73 93 55.

DC INJ High

A DC INJ High fault in your SLK inverter means the DC power levels your system is outputting are too high.

Is a DC INJ High fault covered under warranty or by my insurance?

Solar King inverters come with a five-year warranty. However, since they stopped being installed in Australia in 2012 they will no longer be under warranty. It is unlikely your household insurance policy will cover this kind of fault.

How do I fix a DC INJ High fault?

The quickest and easiest way of resolving a DC INJ High fault in your SLK inverter is to book an inverter health check with us. We’ll send one of our qualified technicians to confirm that the DC INJ High fault is what’s causing your issues. In most cases, this kind of fault cannot be repaired. This means we will need to replace your unit with a new inverter. We will assess the size of your old system, your current tariff arrangements and whether any re-wiring is required. Based on these details, we will then recommend the most suitable replacement for your circumstances. In most cases we will be able to do this all in the same visit, stopping you from incurring additional call-out fees

For more information about DC INJ High faults and to book your faulty inverter in for a health check, complete the form at the bottom of the page or give our friendly team a call on 1300 73 93 55.

Ref 2.5V Fault

A Ref 2.5V fault appears when moisture affects the main board of your SLK inverter. It can be an intermittent issue that occurs as the moisture comes and then dries out again. However, if the fault remains, it cannot be repaired and you will need to replace your inverter.

Is a Ref 2.5V fault covered under warranty or by my insurance?

The first thing to do is check whether your SLK inverter is still under warranty. This brand originally came with a five-year warranty; however, most systems in Australia have long since passed their warranty period.

On the off chance that your inverter is still under warranty, you can either remove the system yourself (as it is basically a ‘plug-and-play’ style of inverter) and bring it into us to swap it over for a unit that is under warranty. If your system wasn’t originally purchased through us, this will incur a fee to cover international freight for the repair. Alternatively, you can call on us to remove and replace it for you by booking your system for an inverter health check.

It’s unlikely that your home insurance policy will cover this kind of fault.

What’s the best way to resolve a Ref 2.5V fault?

If this fault occurs persistently, you will need to replace your inverter, as there is no way to repair this fault. We offer a handy inverter health check which will help you get your system back up and running as quickly and painlessly as possible.

We’ll send an experienced solar technician to your home and they’ll conduct a full inspection of your solar power system. Once they’ve determined the nature of the fault, if needed they will replace your existing inverter with a suitably compatible replacement.

To arrange your inverter health check, please call us 1300 73 93 55, visit this page or simply fill in your details below and we’ll be in touch soon. To find out how to remedy these issues and for a complete list of all Solar King SLK inverter error codes, see below

All Solar King SLK inverter fault codes
 

Fault Code Description Remedy
No Utility No AC line Check that the solar supply main switch located in the meter box is on. If there is power to all three phases of the house, then we recommend that you book a system health check in order to have the isolators checked. If the isolators don't turn out to be the issue, we may need to verify the AC fuse as well (which will induce an additional cost of $20). If both the isolators and the AC fuse are fine, then the inverter will need to be replaced.
 
PV Over Voltage PV voltage is too high If this fault appears intermittently, it simply means that the system's production is peaking. However, if it is a constant error (i.e. it doesn't leave the screen, even in the morning and late afternoon), then it indicates a permanent failure and requires replacement. Contact Solargain for a solar maintenance service.
 
DC Bus High DC bus voltage is too high If this fault appears intermittently, it simply means that the system's production is peaking. However, if it is a constant error (i.e. it doesn't leave the screen, even in the morning and late afternoon), then it indicates a permanent failure and requires replacement.
Contact Solargain for a solar maintenance service.
 
DC Bus Low DC bus voltage is too low If this fault appears intermittently, it simply means that the system's DC output is low (i.e. in winter or early in the morning or late in the afternoon). However, if it is a constant error (i.e. it doesn't leave the screen, even in the middle of the day), then it indicates a permanent failure and requires replacement. Contact Solargain for a solar maintenance service.
Over Temperature Temperature is too high This fault reflects a fan failure. It usually starts as an intermittent fault and eventually becomes terminal. The inverter will need to be replaced. Contact Solargain for a solar maintenance service.
Grid Fault Grid voltage or grid frequency is wrong Check that the AC isolator and the solar supply main switch located in the meter box are on. If the fault appears intermittently, there is a grid voltage issue, which needs to be reported to the power distributor. However, if it is a constant error, the inverter needs to be replaced. Contact Solargain for a solar maintenance service.
Device Fault Hole sensor, GFCI device If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
Isolation Fault PV panel isolation problem
If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service. If the solar supply main switch located in the meter box is on, we recommend that you book a health assessment in order to have a technician check for water in the isolators. If the fault appears intermittently (when there is moisture or rain), then, it is a legitimate fault, with water getting into the installation. However, if it is a constant error, the technicians will need to check your inverter's AC fuse (which incurs an additional $20 fee). The inverter might require replacement.
 
Impedance Fault Grid impedance fault If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
Ground I Fault Ground leakage too high This fault can pertain to water ingress or panel-related earth faults. We recommend a health check to eliminate an external cause for this fault, prior to purchasing a new inverter.
Relay Failure Relay fail If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
DC INJ High Output DC injection too high If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
Ref 2.5V Fault 2.5V reference voltage inside problem If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
DC Sensor Fault Output DC sensor abnormal If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
GFCI Fault GFCI detection problem If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
Sci Fault Communication between master and slave problem If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
Consistent Fault The value of master and slave are mismatch If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
CPU Ver Mismatch Firmware version of master and slave are not the same If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
EEPROM Fault EEprom problem If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
Grid V Mismatch The Grid V of master and slave are mismatch If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
Grid F Mismatch The Grid F of master and slave are mismatch If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
Grid Z Mismatch The Grid impedance of master and slave are mismatch If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
GFCI Mismatch The GFCI value of master and slave are mismatch If this is a permanent fault, the inverter requires replacement. Contact Solargain for a solar maintenance service.
 
Power light on BUT OP WATTS=0   In this scenario, the system is often faulty. Therefore, it will need replacing.
Completely dead No lights, no screen If all switches are in the 'on' position, it means that the inverter needs to be replaced.
DC Curr Mismatch The output DC current of master and slave are mismatch  
PRODUCTION QUERY   Please refer to the monitoring guide below for the figures Solargain will need to assess.
    If your inverter's yield is low, there could be a panel fault. We recommend a health check. If there is no yield, the inverter may be faulty and require replacing.
 

Follow our Solar King SLK Monitoring Guide below to check the amount of power your system is producing and how well it‘s performing. If you have a Solar King inverter it should display a blue power light to indicate that it is running normally during the day. To scroll through your inverter’s menu, use the black button on the bottom left side of the screen. If you press this button the first page that will display is Working Mode followed by OP WATT.

The best indicator of performance is the reading which precedes KWH.

Press it again to show PV VOLT and then continue until you come to KWH.

The complete order of the screens is as follows: OP WATT > PV VOLT > GRID VOLT > GRID FREQ > O/P CUR > XXX.XX KWH > RATING=XX KW > M CPU VER XXX > S CPU VER XXX.

The end figure indicates the cumulative total of kilowatt-hours your system has produced since it’s initial installation. To obtain your daily production, record this figure first thing in the morning and then again later in the day before the system shuts off but as the sun is setting and production is winding down. The difference in these figures will indicate your system’s daily production.

For example:

  • January 15, 8am: 100KWH
  • January 15 6pm: 110KWH

Therefore, your daily production is 10 kWh (110 less 100).

If you record this figure at the beginning and the end of each month, the difference between the two figures will provide you with your overall monthly yield. To find your daily average, divide the difference by the number of days in between.

For example:

  • E-Total on January 1 is 1100
  • E-Total on February 1 is 1300

Therefore, January’s monthly yield is 200 units (1300 less 1100)

January’s average daily yield is 6.45 kWh (200 monthly yield divided by 31 days in January)

How do you check that your data is normal?

If you’re a Solargain customer you would have received a Solargain Customer User Manual in a black handover folder when our technicians installed your system. To check that your system is working correctly, and is producing energy within expected parameters, you can compare the data you record each month with the figures provided in the Manual. If you cannot find your Manual, please call Solargain on 1300 73 93 55 and we will arrange to send a new one to you.

Troubleshooting and Resetting Your Solar King SLK Inverter

The Solar King SLK inverter range will detect major internal issues within its systems, displaying a fault light until the problem has been resolved. If this occurs, contact us as soon as possible. In the morning and late afternoon as the inverter is turning on or off you may notice a red light and hear a clicking noise. These are normal functions of the inverter – there’s no need to worry about these. 

If your inverter continues to display a red light throughout the day you should reset it. Instructions explaining how to do this are available on our website. If, after resetting the unit, the red light remains on, note down the error code displayed on the screen as well as the serial number from the sticker located on the side of your inverter and then contact our service team. We’ll happily assist you in resolving the issue.

Regardless of whether you purchased your Solar King SLK inverter from us, we can assist with servicing and maintenance.

Servicing helps ensure your inverter continues to work safely and efficiently. Our qualified solar power technicians have a wide knowledge base about the Solar King range and are more than qualified to maintain your system correctly. As an ISO 9001 accredited company, we are dedicated to quality and safety – and are regarded as a leading presence in the solar industry.

If you’re looking to upgrade your Solar King inverter, talk to us about our trade-in deals. Depending on your model and its condition, we offer generous incentives for customers seeking to upgrade their existing inverter to a more advanced unit.
 

Arrange your inverter health check now

If you would like one of our technicians to take a look at your inverter, just fill out the form below to book your inverter health check today.
 

Please enter your details in the form below