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

Sun Apr 12 08:02:02 PDT 2026

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
>>>>>>
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