Sol-Ark Fault Codes

[SparWeb]

I've had a Sol-Ark 12k-2P-N for about 8 months. Since the spring I have seen several fault codes.

Question #1, How normal is this? I live in the country, and experience brown-outs and black-outs much more often that city-dwellers. I'm tempted to chalk it up to that, and blame the utility - but what if it isn't just them?

Question #2, Does anyone have the full list of fault codes, including the unpublished ones? Fault F59 is not listed in the Sol-Ark owner/installer's manual.

Question #3, Does anyone notice that fault F15 is not the same fault listed in the 12K owner's manual?

2025-08-04 19:53:50 Inverter F47 - AC_OverFreq_Fault
2025-07-27 05:48:01 Inverter F59 - AC_V_GridCurr_High_Fault
2025-07-09 19:25:56 Inverter F47 - AC_OverFreq_Fault
2025-06-30 16:41:35 Inverter F47 - AC_OverFreq_Fault
2025-06-26 19:23:16 Inverter F47 - AC_OverFreq_Fault
2025-06-23 16:08:10 Inverter F15 - SW_AC_OverCurr_Fault
2025-06-18 07:30:24 Inverter F47 - AC_OverFreq_Fault
2025-06-13 14:41:10 Inverter F47 - AC_OverFreq_Fault
2025-06-04 22:55:07 Inverter F47 - AC_OverFreq_Fault
2025-06-04 21:46:45 Inverter F47 - AC_OverFreq_Fault
2025-05-18 15:58:30 Inverter F47 - AC_OverFreq_Fault
2025-05-16 12:12:31 Inverter F47 - AC_OverFreq_Fault
2025-05-15 06:16:54 Inverter F59 - AC_V_GridCurr_High_Fault
2025-05-12 14:50:32 Inverter F47 - AC_OverFreq_Fault
2025-04-09 07:21:44 Inverter F47 - AC_OverFreq_Fault
2025-04-01 22:55:08 Inverter F59 - AC_V_GridCurr_High_Fault
2025-04-01 22:27:20 Inverter F59 - AC_V_GridCurr_High_Fault

FYI, this Sol-Ark 12K is currently set up to export PV to the grid, and nothing else.

(Question 4: Why the F would they have fault codes and not tell the users what they are??)

 

[Quattrohead]

Check the Deye version of these fault codes and see if that gives you more information, Deye is the OEM manufacturer of these inverters.

 

[SparWeb]

Thanks! Great suggestion - I didn't know about Deye.
The device looks very similar, and the fault codes look very similar, too.
However their fault code list is even shorter than the one provided by Sol-Ark.

 

[Zapper77]

How large is the solar array. Are the grid wires undersized?

 

[houseofancients]

I've had a Sol-Ark 12k-2P-N for about 8 months. Since the spring I have seen several fault codes.

Question #1, How normal is this? I live in the country, and experience brown-outs and black-outs much more often that city-dwellers. I'm tempted to chalk it up to that, and blame the utility - but what if it isn't just them?

Question #2, Does anyone have the full list of fault codes, including the unpublished ones? Fault F59 is not listed in the Sol-Ark owner/installer's manual.

Question #3, Does anyone notice that fault F15 is not the same fault listed in the 12K owner's manual?

2025-08-04 19:53:50 Inverter F47 - AC_OverFreq_Fault
2025-07-27 05:48:01 Inverter F59 - AC_V_GridCurr_High_Fault
2025-07-09 19:25:56 Inverter F47 - AC_OverFreq_Fault
2025-06-30 16:41:35 Inverter F47 - AC_OverFreq_Fault
2025-06-26 19:23:16 Inverter F47 - AC_OverFreq_Fault
2025-06-23 16:08:10 Inverter F15 - SW_AC_OverCurr_Fault
2025-06-18 07:30:24 Inverter F47 - AC_OverFreq_Fault
2025-06-13 14:41:10 Inverter F47 - AC_OverFreq_Fault
2025-06-04 22:55:07 Inverter F47 - AC_OverFreq_Fault
2025-06-04 21:46:45 Inverter F47 - AC_OverFreq_Fault
2025-05-18 15:58:30 Inverter F47 - AC_OverFreq_Fault
2025-05-16 12:12:31 Inverter F47 - AC_OverFreq_Fault
2025-05-15 06:16:54 Inverter F59 - AC_V_GridCurr_High_Fault
2025-05-12 14:50:32 Inverter F47 - AC_OverFreq_Fault
2025-04-09 07:21:44 Inverter F47 - AC_OverFreq_Fault
2025-04-01 22:55:08 Inverter F59 - AC_V_GridCurr_High_Fault
2025-04-01 22:27:20 Inverter F59 - AC_V_GridCurr_High_Fault

FYI, this Sol-Ark 12K is currently set up to export PV to the grid, and nothing else.

(Question 4: Why the F would they have fault codes and not tell the users what they are??)

These codes usually point to an unstable grid.
Here is a list of them. :

DEYE - 5-12KW - Fault Codes | PDF | Power Inverter | Electric Power Transmission

This document provides a list of fault codes and troubleshooting steps for a Deye Three Phase Hybrid Inverter SUN-5-12KWSG04LP3. It describes 23 different fault codes related to issues like fans, grid connection, communication failures, overcurrents and more. For each fault, 1-3 troubleshooting...

www.scribd.com

 

[robby]

I've had a Sol-Ark 12k-2P-N for about 8 months. Since the spring I have seen several fault codes.

Question #1, How normal is this? I live in the country, and experience brown-outs and black-outs much more often that city-dwellers. I'm tempted to chalk it up to that, and blame the utility - but what if it isn't just them?

Question #2, Does anyone have the full list of fault codes, including the unpublished ones? Fault F59 is not listed in the Sol-Ark owner/installer's manual.

Question #3, Does anyone notice that fault F15 is not the same fault listed in the 12K owner's manual?

2025-08-04 19:53:50 Inverter F47 - AC_OverFreq_Fault
2025-07-27 05:48:01 Inverter F59 - AC_V_GridCurr_High_Fault
2025-07-09 19:25:56 Inverter F47 - AC_OverFreq_Fault
2025-06-30 16:41:35 Inverter F47 - AC_OverFreq_Fault
2025-06-26 19:23:16 Inverter F47 - AC_OverFreq_Fault
2025-06-23 16:08:10 Inverter F15 - SW_AC_OverCurr_Fault
2025-06-18 07:30:24 Inverter F47 - AC_OverFreq_Fault
2025-06-13 14:41:10 Inverter F47 - AC_OverFreq_Fault
2025-06-04 22:55:07 Inverter F47 - AC_OverFreq_Fault
2025-06-04 21:46:45 Inverter F47 - AC_OverFreq_Fault
2025-05-18 15:58:30 Inverter F47 - AC_OverFreq_Fault
2025-05-16 12:12:31 Inverter F47 - AC_OverFreq_Fault
2025-05-15 06:16:54 Inverter F59 - AC_V_GridCurr_High_Fault
2025-05-12 14:50:32 Inverter F47 - AC_OverFreq_Fault
2025-04-09 07:21:44 Inverter F47 - AC_OverFreq_Fault
2025-04-01 22:55:08 Inverter F59 - AC_V_GridCurr_High_Fault
2025-04-01 22:27:20 Inverter F59 - AC_V_GridCurr_High_Fault

FYI, this Sol-Ark 12K is currently set up to export PV to the grid, and nothing else.

(Question 4: Why the F would they have fault codes and not tell the users what they are??)

Fault 59 means that the Battery is not able to provide the current the Inverter needs. I know this can come from the BMS if it has proper closed loop comms with the batteries or it could be a Max discharge setting inside the BMS that is triggered even in open loop.

As others have said I think all of these errors indicate that the Grid is having issues and/or your Inverter settings need adjusting.
F15 is the same error on all the sources I have.
If I was to take a guess your Grid voltage has inadequate power, so when a large load comes on the Grid Voltage drops below your specified trip point and the Inverter takes over. When the Inverter picks up this sudden load it is unable to draw the needed Amps from the batteries to keep the voltage stable so it trips.

Some things to look at:
How much battery capacity do you have and is the Wire size adequate?
Have you checked the tightness of all the battery terminal and the breakers on the Inverter?
Have you measured the Utility voltage coming into the house and also measured it when loaded down with say 6Kw or more of load?
What values do you have under the Grid Settings for "Low Voltage Disconnect" and "High Voltage Disconnect"?
What values do you have for Low Frequency and High Frequency?

If your tolerances values are too tight you will get a lot of errors with an unstable grid.

 

[SparWeb]

These codes usually point to an unstable grid.
Here is a list of them. :

DEYE - 5-12KW - Fault Codes | PDF | Power Inverter | Electric Power Transmission

This document provides a list of fault codes and troubleshooting steps for a Deye Three Phase Hybrid Inverter SUN-5-12KWSG04LP3. It describes 23 different fault codes related to issues like fans, grid connection, communication failures, overcurrents and more. For each fault, 1-3 troubleshooting...

www.scribd.com

Perfect, thanks!

 

[SparWeb]

Fault 59 means that the Battery is not able to provide the current the Inverter needs. I know this can come from the BMS if it has proper closed loop comms with the batteries or it could be a Max discharge setting inside the BMS that is triggered even in open loop.

As others have said I think all of these errors indicate that the Grid is having issues and/or your Inverter settings need adjusting.
F15 is the same error on all the sources I have.
If I was to take a guess your Grid voltage has inadequate power, so when a large load comes on the Grid Voltage drops below your specified trip point and the Inverter takes over. When the Inverter picks up this sudden load it is unable to draw the needed Amps from the batteries to keep the voltage stable so it trips.

Some things to look at:
How much battery capacity do you have and is the Wire size adequate?
Have you checked the tightness of all the battery terminal and the breakers on the Inverter?
Have you measured the Utility voltage coming into the house and also measured it when loaded down with say 6Kw or more of load?
What values do you have under the Grid Settings for "Low Voltage Disconnect" and "High Voltage Disconnect"?
What values do you have for Low Frequency and High Frequency?

If your tolerances values are too tight you will get a lot of errors with an unstable grid.

Hi @robby,

This is a bit confusing because the faults mean as follows:
F15 AC overcurrent fault
F47 Grid frequency out of range
F59 AC Grid current high

My Sol-Ark is connected to PV panels by DC, and output directly to grid by the grid terminals. That's it.
No battery.
No sub-panel.
No generator.

Why would F15 or F59 occur?

I think I understand F47 - I live in the country and the grid has instabilities, brown-outs, and such things.
FYI, there are 6.5kW of Longi 440w panels, in 2 strings, feeding this Sol-Ark 12k inverter. Hardly overloaded.

I still think you have a point - with unstable power from the grid, tight tolerances in the Inverter settings will cause nuisance faults. Thank you for your effort to consider the situation, despite the confusing information these codes offer.

I can dig around in the logs and look for unusual values, that may offer more clues.

 

[robby]

Hi @robby,

This is a bit confusing because the faults mean as follows:
F15 AC overcurrent fault
F47 Grid frequency out of range
F59 AC Grid current high

My Sol-Ark is connected to PV panels by DC, and output directly to grid by the grid terminals. That's it.
No battery.
No sub-panel.
No generator.

Why would F15 or F59 occur?

I think I understand F47 - I live in the country and the grid has instabilities, brown-outs, and such things.
FYI, there are 6.5kW of Longi 440w panels, in 2 strings, feeding this Sol-Ark 12k inverter. Hardly overloaded.

I still think you have a point - with unstable power from the grid, tight tolerances in the Inverter settings will cause nuisance faults. Thank you for your effort to consider the situation, despite the confusing information these codes offer.

I can dig around in the logs and look for unusual values, that may offer more clues.

Oh you have no battery.
That pretty much explains it. The system is going to be very unstable if the grid fluctuates at all and there is no battery power to pull from to use and compensates with.
You need to get at least 15KWh worth of Batteries to make the system stable.
If you were in somewhere where the power is typically always stable then you might be able to get away with no batteries, but in most places you will need them.

 

[SparWeb]

Thanks Robby.
Fortunately, my new batteries are (I'm told) on a truck right now getting closer every day!

 

[SparWeb]

About those batteries... Yesterday I called the vendor. "What gives, where are they?"
After being switched about the automated phone menu system, eventually I spoke to someone and found out they hadn't actually been shipped last month at all!
I held my true words back... they still have my money...
This will be a ridiculous story tell - but I won't tell it yet. Afraid to jinx it, now, I admit.

 

[robby]

Wow that is a long time.
Why not cancel the order and get some Eco Worthy 100Ah batteries and a rack.
I don't know if they have a distributor in Canada but its worth asking them.

 

[dustyPanels]

Here's a good fault code list. They even have troubleshooting examples.
Sol-Ark troubleshooting guide
Again, #59 isn't on the list.
(I'd enjoy hearing your battery story after the dust settles.)

 

[SparWeb]

Thanks Dusty!

I've only had 1 more fault since I started this thread.
Looking back at power outages, I'm finding alignment with most of these faults. That doesn't explain why one outage gives a F15 fault, while another gives a F47, but in either case the grid power goes out and the Sol-Ark records it.

 

[robby]

Here's a good fault code list. They even have troubleshooting examples.
Sol-Ark troubleshooting guide
Again, #59 isn't on the list.
(I'd enjoy hearing your battery story after the dust settles.)

Fault 59 means that the Battery is not able to provide the current the Inverter needs.
It's probably being logged because the Inverter has no batteries and the subroutine that generates the error is not checking the No Battery setting before generating the error.

 

[dustyPanels]

Hopefully SparWeb will succeed in getting his batteries and banish fault 59, and perhaps all the other faults as well.

We have to love the crazy software routines we depend on every day :-( or not!