Solis inverter fault codes
What does my Solis fault code mean?
A fault code is an alarm sent from your Solis inverter, either in the app or on the inverter screen, to tell you something needs attention, such as a grid fault, an internal error, or a communication problem. This page explains the most common codes and what to do about each one.
Some codes are temporary and clear on their own. Others need a restart, which we will talk you through so it is done safely. Find your code below. If you are not sure what to do, contact your PureVolt installation team and we will help.
1010 - Grid over voltage
What causes the "Grid Over Voltage" alarm?
The inverter continually monitors the voltage of the external grid coming into your house. If the external supply to your house goes above the normal voltage range, the inverter automatically disconnects and stops producing. The inverter will display the "Grid Over Voltage" alarm to let you know why it's paused generation.
Why does it do this?
This action is a regulation set by ESB Networks. They dictate the voltage limits when inverters must disconnect, which helps them balance the grid.
The grid voltage tends to lift when there's more generation on the grid than demand. If inverters stop producing when grid voltage gets too high in the local area, it helps get things back in balance by temporarily reducing supply into the grid. So ESB networks make this action a requirement that all solar installations must follow.
When this happens, the inverter will disconnect, then monitor the voltage. As soon as it comes back into the correct range, it reconnects and starts generating again. These voltage spikes are usually quite short-lived. The inverter is normally back generating in a few minutes.
What if this alarm happens again?
If you find this alarm is only occasional, all is fine to leave the system operating as it is. No harm will come to your installation as the inverter is disconnecting as it should. You may find it more common on sunny summer days when there's high levels of solar generation across the country.
If the alarm happens frequently
ESB networks aim to deliver electricity to domestic properties in a voltage range between 207 - 253 volts. Our PV inverters are programmed as per the regulations to connect to the supply grid and generate between these voltage ranges too. If you experience a constant problem of Grid Over Voltage 1010 on your installation, you could contact ESB networks. They may visit your site and leave a voltage monitoring device on your property and record your supply voltage for a week or two. After this, a decision will be made by ESB networks to adjust your supply if necessary.
1015 - No grid detected
If your inverter displays the "No Grid" error (1015), follow these troubleshooting steps:
If you have lost mains power:
If your inverter has lost grid power, it will display an alarm until grid power is restored. Once the inverter detects grid voltage, it will reconnect to the grid automatically, and no further action is required on your part.
If grid power is restored but your system displays "No Grid":
It's possible that the protective device in your fuseboard may need to be reset. Please follow these steps:
- Locate the protective device labelled "Inverter" in your main fuseboard or a smaller fuseboard installed during your project.
- If the switch is pointing down, everything is okay, but it may have been triggered by the grid coming back online.
- Flick the switch back to the correct position, and your system should come back online within 5-10 minutes.
1055 - Battery not connected
Battery is offline
Some people have reported that their battery is dead or offline. This happens because, during a power cut, their inverters remained powered on by drawing energy from the battery. In properties that experienced an extended power outage, the inverter eventually drained the battery completely.
These batteries function similarly to a car battery - once fully drained, they require a jump start to operate again. If you believe this has happened to your battery, please contact us. We can then schedule a visit to get your battery up and running again. If your battery is paired with a Solis inverter, you can read more about the recovery process in our guide on waking a deeply discharged Solis battery.
If your inverter displays the "Battery Not Connected" error (1055)
The 1055 alarm means the inverter has lost contact with the battery. The usual causes are a tripped battery breaker, a loose battery cable, or the battery switching itself off to protect its cells. All of these sit on the battery side of the system, so they need to be checked by a qualified engineer. Contact us and we will arrange a visit if one is needed.
If the battery has no lights at all, it may have gone into deep-discharge protection after a power cut. There is more on that in the box above.
Solis alarm code quick reference
This table lists all known alarm codes generated by Solis inverters. Most of them are rare. It explains what each code means.
A few words come up again and again in the table below. Here is what they mean in plain English:
- Grid or mains supply: The electricity coming into your house from the outside network (ESB Networks).
- Voltage: How hard that electricity is being pushed through the wires.
- Current: How much electricity is flowing at any one moment (think of it like the volume of water moving through a pipe).
- Frequency: The rhythm of the power supply. In Ireland, it pulses exactly 50 times a second.
- Overcurrent: A safety trip that happens when more current flows than the system is built to handle, shutting it down safely to protect the hardware.
- DC: The direct current power used on the panel and battery side of your system.
- AC: The alternating current power used on the side your household appliances and sockets use.
- Internal computer: The built-in computer inside the inverter that monitors and manages your system.
- Firmware: The specialised operating software that runs on that internal computer.
A few of these codes clear on their own, and the table says so. For everything else, please do not restart the inverter or the battery yourself. A restart has to be carried out in a specific order, and switching the inverter or the battery off in the wrong order can damage the battery. Checking wiring is a job for a qualified engineer.
So if a code appears on your system, note the code and contact us. We will tell you exactly what is needed.
| Error code | What it means |
|---|---|
| 1010 | The voltage of the mains supply is too high. The inverter reconnects on its own once the supply returns to normal. |
| 1011 | The voltage of the mains supply is too low. The inverter reconnects on its own once the supply returns to normal. |
| 1012 | The rhythm of the mains supply is slightly too fast. The inverter reconnects on its own once the supply returns to normal. |
| 1013 | The rhythm of the mains supply is slightly too slow. The inverter reconnects on its own once the supply returns to normal. |
| 1015 | The inverter cannot detect any mains supply. See the 1015 section above. |
| 1016 | The mains supply is uneven across its three phases. This is rare in a normal home. |
| 1017 | The rhythm of the mains supply is outside its normal range. The inverter reconnects on its own once the supply returns to normal. |
| 1018 | Too much current is being drawn from the mains supply. |
| 1019 | The inverter is having trouble reading the mains supply correctly. |
| 1020 | The voltage coming in from your panels is too high, or there is a fault inside the inverter on the panel side. |
| 1021 | The voltage inside the inverter has risen too high. |
| 1022 | The inverter's internal voltage is reading incorrectly. |
| 1023 | The inverter's internal voltage reading is displaying incorrectly. |
| 1025 | Too much current is coming in from one of your panel strings (input 1). |
| 1026 | Too much current is coming in from one of your panel strings (input 2). |
| 1027 | The current coming in from your panels is outside its normal range. |
| 1030 | The mains supply is carrying interference from something else nearby. |
| 1031 | The inverter failed its start-up check. |
| 1032 | The inverter has got too hot. |
| 1033 | The inverter has detected an earthing problem with your solar panels. |
| 1034 | The inverter's safety cut-out for stray current has tripped. |
| 1035 | One of the inverter's internal switches has failed. |
| 1036 | The inverter's internal computer has stopped responding. |
| 1037 | A small amount of DC electricity is leaking onto the mains side of your system. |
| 1038 | One of the inverter's internal power supplies has failed. |
| 1039 | The sensor that watches for stray current has failed. |
| 103A | The inverter is too cold to run. |
| 1040 | The inverter's safety check for electrical arcing (sparking) did not pass. |
| 1041 | Electrical arcing (sparking) has been detected on the panel side of your system. Contact us immediately. |
| 1047 | The inverter is having trouble reading the mains supply. |
| 1048 | Too much current is flowing through the inverter's main power circuit. |
| 1050 | A brief surge of current from the mains supply. |
| 1051 | The battery voltage is too high. |
| 1052 | Too much current is flowing on the backup supply circuit. |
| 1053 | The battery voltage is too high. |
| 1054 | The battery voltage is too low. |
| 1055 | Battery not connected. See the 1055 section above. |
| 1056 | The voltage on the backup supply is too high. |
| 1057 | The backup supply circuit is overloaded. |
| 1058 | The inverter's internal computer failed its start-up check. |
| 105A | The software inside the inverter does not match the model it is set up as. |
| 2010 | The inverter has lost contact with the unit that manages how much power goes out to the grid. |
| 2011 | The inverter has lost contact with your electricity meter. |
| 2012 | Battery communication fail. See our full guide to code 2012. |
| 2014 | The inverter's internal computer has stopped responding. |
| 2015 | Battery protection alarm. The battery has switched itself into protection mode. |
| 2016 | Wrong battery brand selected in the inverter settings. |
| 2017 | Battery protection alarm. This one needs your installer. Contact us. |
| 2018 | The inverter has lost the signal it uses to respond to demand on the grid. |
| 2019 | Battery protection fault on an LG battery. |
| 2021 | Battery communication fault on an LG battery. |
Need a hand?
If your code is not listed here, or the steps above have not cleared it, get in touch with your installation team at PureVolt.ie. Whether you call or email, it helps to have the fault code, your inverter model, and anything you have already tried to hand.
You might also find these guides useful:
- Battery dead after a power cut, what to do if your battery has no lights after an outage.
- Solis remote access setup, how to give us remote access to your inverter.
- Solis battery communication fault (code 2012), battery communication troubleshooting.