[RE-wrenches] Sol-Ark 15K2P F20 MPPT Overcurrent Error

Sun Apr 12 09:06:56 PDT 2026

I'm facing an issue with a utility interconnection that is probably going
to require native 208 volt without a transformer. The utility company is
requiring a power plant controller with onerous requirements. I'm going to
have to get with Sol-Ark to see if their product can communicate via modbus
with a power plant controller that does everything we need it to do.

Jason Szumlanski
Principal Solar Designer | Florida Solar Design Group
NABCEP Certified Solar Professional (PVIP)
Florida State Certified Solar Contractor CVC56956
Florida Certified Electrical Contractor EC13013208

On Sun, Apr 12, 2026, 11:07 AM Daryl DeJoy via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hi Jason,
>   I did not, just checked all of my design work with SolArk engineers. I
> might suggest using half that amount of 60k's with a transformer to drop it
> down to 120/208. It simplifies layout and space considerations. The
> advantage of using the 60k's is that you can do much longer strings of PV,
> with an 800v max input voltage than with the 30k's 500v max voltage. Just
> thoughts.
>    The majority of my SolArk installs are in the Caribbean. I have one
> commercial system with five 60k's and the only issue we had was with their
> high voltage batteries. We had some of the first off the line and they had
> temp sensor issues. They seem to have gotten that figured out, but they
> literally sent a tech down for a week to work with us. He changed out the
> sensors and ensure things were working properly. Since then we've just had
> to keep up with software upgrades and we've had a couple of the old dongles
> needed replacing, but the system is running an entire stone crushing plant
> and charging five electric forklifts, not off grid, but with essentially no
> electric bill to speak of.
>
> Daryl
>
> On Sun, Apr 12, 2026, 10:46 AM Jason Szumlanski via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> I Daryl,
>>
>> I have a project that might benefit from ten Sol-Ark 30K (max in
>> parallel). Did you work with a consulting engineer on your 60K projects? I
>> am looking for qualified engineers who can handle large systems like this.
>>
>> Best,
>>
>>
>> Jason Szumlanski
>> Principal Solar Designer | Florida Solar Design Group
>> NABCEP Certified Solar Professional (PVIP)
>> Florida State Certified Solar Contractor CVC56956
>> Florida Certified Electrical Contractor EC13013208
>>
>>
>>
>>
>> On Sun, Apr 12, 2026 at 8:46 AM Daryl DeJoy via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>>> We have over 130 Solark inverters installed, from 5k to multiples of
>>> 60k's and I have not seen that error at all. I have found their inverters
>>> to be reliable as long as their software updates are kept up to date.
>>> That's just my experience, though.
>>>
>>> Daryl DeJoy
>>> NABCEP Certified PVIP since 2006
>>> Island Energy Storage
>>>
>>> On Sun, Apr 12, 2026, 8:35 AM Jay via RE-wrenches <
>>> re-wrenches at lists.re-wrenches.org> wrote:
>>>
>>>> Is this a common problem with Sol Ark inverters?
>>>>
>>>>
>>>>
>>>> On Apr 12, 2026, at 5:40 AM, david quattro via RE-wrenches <
>>>> re-wrenches at lists.re-wrenches.org> wrote:
>>>>
>>>> 
>>>> In a similar vein of thought, it may be helpful to only engage one
>>>> string at a time to hopefully isolate error codes.
>>>>
>>>>
>>>>
>>>> On Sat, Apr 11, 2026 at 8:36 AM Jason Szumlanski <
>>>> jason at floridasolardesigngroup.com> wrote:
>>>>
>>>>> You might consider taking this one step further and physically
>>>>> disconnecting one string at a time. Since the error happens multiple times
>>>>> a day, maybe you can isolate the issue to one string.
>>>>>
>>>>>
>>>>> Jason Szumlanski
>>>>> Principal Solar Designer | Florida Solar Design Group
>>>>> NABCEP Certified Solar Professional (PVIP)
>>>>> Florida State Certified Solar Contractor CVC56956
>>>>> Florida Certified Electrical Contractor EC13013208
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Fri, Apr 10, 2026 at 7:56 PM david quattro via RE-wrenches <
>>>>> re-wrenches at lists.re-wrenches.org> wrote:
>>>>>
>>>>>> i would swap which strings go into the different MPPT's to see if
>>>>>> each specific problem follows the DC string // or do they follow the
>>>>>> MPPTs.  Another option is kinda a lot of work but might be worth it - take
>>>>>> a different inverter out there and "bench test" it with those strings
>>>>>> unadulterated
>>>>>> Good luck and please let us how this one resolves.
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Fri, Apr 10, 2026 at 4:05 PM Vince McClellan via RE-wrenches <
>>>>>> re-wrenches at lists.re-wrenches.org> wrote:
>>>>>>
>>>>>>> Hello Wrenches
>>>>>>> Has anyone else on this list had issues with a Sol-Ark 15K2P
>>>>>>> randomly shutting down several times a day with an F-20 MPPT overcurrent
>>>>>>> error? The errors are occurring when the system is well under the max
>>>>>>> amperage per MPPT of 26 amps. We've had the inverter turn itself off when
>>>>>>> the online data shows 12.5 amps max. I realize that Sol-Ark's online data
>>>>>>> updates only every 5 minutes, so I could be possible that there is a spike
>>>>>>> that the online data isn't showing, but the array is in full sun with the
>>>>>>> same number of modules and the same string configuration on all 3 MPPT's.
>>>>>>>
>>>>>>> We are also seeing other anomalies such as MPPT 1 at 12 amps with
>>>>>>> MPPT 2 and 3 at 22 amps. Again, with the solar array in full sun, no
>>>>>>> clouds, and no shade.
>>>>>>>
>>>>>>> Sol-Ark originally thought it was because of an issue with Tigo RSD
>>>>>>> switches, but we don't use Tigo. We've had way too many issues with Tigo
>>>>>>> products.
>>>>>>>
>>>>>>> We've had people suggest that we're seeing the results of an edge of
>>>>>>> cloud affect, but there are not clouds to cause this.
>>>>>>>
>>>>>>> We've also tested all the circuits with a insulation tester in every
>>>>>>> possible configuration, and tested our wiring to insure there were no
>>>>>>> mistakes by ringing it out with a multimeter. The wiring is good.
>>>>>>>
>>>>>>> Sol-Ark tech support doesn't seem to know what the issue is, but
>>>>>>> they are assuring us that it's not their inverter at fault.
>>>>>>>
>>>>>>> I could use any suggestions that come to mind. I'm not sure what
>>>>>>> else to try at this point.
>>>>>>>
>>>>>>> Thank you,
>>>>>>>
>>>>>>>
>>>>>>> Vince McClellan
>>>>>>>
>>>>>>> President
>>>>>>>
>>>>>>> NABCEP PV Professional
>>>>>>>
>>>>>>> p: 541-485-8122
>>>>>>>
>>>>>>> a: 860 Conger St. Suite 12,. Eugene, OR 97402
>>>>>>> <https://www.google.com/maps/search/860%0D%0AConger+St.+Suite+12,.+Eugene,+OR+97402?entry=gmail&source=g>
>>>>>>>
>>>>>>> e: vince at solarenergydesgin.com
>>>>>>>
>>>>>>> w: SolarEnergyDesign.com
>>>>>>>
>>>>>>> CCB# 161672
>>>>>>>
>>>>>>> If you have received this email and are not the intended recipient,
>>>>>>> please delete this email. Copying or using any part, content, or attachment
>>>>>>> of this email is strictly prohibited.
>>>>>>> _______________________________________________
>>>>>>> List sponsored by Redwood Alliance
>>>>>>>
>>>>>>> Pay optional member dues here: http://re-wrenches.org
>>>>>>>
>>>>>>> List Address: RE-wrenches at lists.re-wrenches.org
>>>>>>>
>>>>>>> Change listserver email address & settings:
>>>>>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>>>>>>
>>>>>>> There are two list archives for searching. When one doesn't work,
>>>>>>> try the other:
>>>>>>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>>>>>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>>>>>>
>>>>>>> List rules & etiquette:
>>>>>>> http://www.re-wrenches.org/etiquette.htm
>>>>>>>
>>>>>>> Check out or update participant bios:
>>>>>>> http://www.members.re-wrenches.org
>>>>>>>
>>>>>>> _______________________________________________
>>>>>> List sponsored by Redwood Alliance
>>>>>>
>>>>>> Pay optional member dues here: http://re-wrenches.org
>>>>>>
>>>>>> List Address: RE-wrenches at lists.re-wrenches.org
>>>>>>
>>>>>> Change listserver email address & settings:
>>>>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>>>>>
>>>>>> There are two list archives for searching. When one doesn't work, try
>>>>>> the other:
>>>>>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>>>>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>>>>>
>>>>>> List rules & etiquette:
>>>>>> http://www.re-wrenches.org/etiquette.htm
>>>>>>
>>>>>> Check out or update participant bios:
>>>>>> http://www.members.re-wrenches.org
>>>>>>
>>>>>> _______________________________________________
>>>> List sponsored by Redwood Alliance
>>>>
>>>> Pay optional member dues here: http://re-wrenches.org
>>>>
>>>> List Address: RE-wrenches at lists.re-wrenches.org
>>>>
>>>> Change listserver email address & settings:
>>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>>>
>>>> There are two list archives for searching. When one doesn't work, try
>>>> the other:
>>>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>>>
>>>> List rules & etiquette:
>>>> http://www.re-wrenches.org/etiquette.htm
>>>>
>>>> Check out or update participant bios:
>>>> http://www.members.re-wrenches.org
>>>>
>>>> _______________________________________________
>>>> List sponsored by Redwood Alliance
>>>>
>>>> Pay optional member dues here: http://re-wrenches.org
>>>>
>>>> List Address: RE-wrenches at lists.re-wrenches.org
>>>>
>>>> Change listserver email address & settings:
>>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>>>
>>>> There are two list archives for searching. When one doesn't work, try
>>>> the other:
>>>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>>>
>>>> List rules & etiquette:
>>>> http://www.re-wrenches.org/etiquette.htm
>>>>
>>>> Check out or update participant bios:
>>>> http://www.members.re-wrenches.org
>>>>
>>>> _______________________________________________
>>> List sponsored by Redwood Alliance
>>>
>>> Pay optional member dues here: http://re-wrenches.org
>>>
>>> List Address: RE-wrenches at lists.re-wrenches.org
>>>
>>> Change listserver email address & settings:
>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>>
>>> There are two list archives for searching. When one doesn't work, try
>>> the other:
>>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>>
>>> List rules & etiquette:
>>> http://www.re-wrenches.org/etiquette.htm
>>>
>>> Check out or update participant bios:
>>> http://www.members.re-wrenches.org
>>>
>>> _______________________________________________
>> List sponsored by Redwood Alliance
>>
>> Pay optional member dues here: http://re-wrenches.org
>>
>> List Address: RE-wrenches at lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> There are two list archives for searching. When one doesn't work, try the
>> other:
>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>
>> List rules & etiquette:
>> http://www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> http://www.members.re-wrenches.org
>>
>> _______________________________________________
> List sponsored by Redwood Alliance
>
> Pay optional member dues here: http://re-wrenches.org
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the
> other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20260412/cf274386/attachment-0001.htm>