[RE-wrenches] Sol-Ark battery calibration

[Dave Tedeyan]

Jay,
This is a sealed lead acid battery bank. So no smarts from the batteries
here!

Cheers,
Dave

On Thu, May 29, 2025, 8:04 PM Jay via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> I guess that means the inverter isn’t getting its voltage reading from the
> battery.
> Assuming a it’s closed loop.
> Jay
>
> On May 29, 2025, at 10:41 AM, Dave Tedeyan via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> 
> Dana,
> Having two inverters makes this a little easier in a sense. One inverter
> matches my meter. The other inverter is reading 0.6v lower than my meter.
>
> Sol-Ark suggested a factory reset, and a firmware update. After both of
> those, I am still seeing the same voltage difference.
>
> In case this means anything to anyone, the first inverter (master, reading
> a lower voltage) was installed in 2021. The second inverter was just
> installed recently. I also had to swap out the MCU board on that master
> inverter in order to get the firmware to match on both inverters.
>
> Cheers,
> Dave
>
> On Thu, May 29, 2025, 11:33 AM Dana Orzel via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> Verify with a second or third meter.
>>
>>
>>
>> _________________________________________________________
>>
>> Dana Orzel                GREAT SOLAR WORKS!
>>
>> C – 208.721.7003      E – dana at solarwork.com
>>
>> W - www. greatsolarworks.com     www.solarwork.com
>>
>> *“Responsible Technologies for Responsible People since 1988!”*
>>
>>
>>
>>
>>
>> ---------- Forwarded message ----------
>> From: Dave Tedeyan via RE-wrenches <re-wrenches at lists.re-wrenches.org>
>> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
>> Cc: Dave Tedeyan <dave at sungineersolar.com>
>> Bcc:
>> Date: Wed, 28 May 2025 19:32:13 +0000
>> Subject: [RE-wrenches] Sol-Ark battery calibration
>> Does anyone know whether you can calibrate the battery voltage on Sol-Ark
>> inverters? I am on site with two 12k-p inverters. My meter agrees with one
>> of them, and the other inverter (the master) is displaying 0.6v lower than
>> both my meter and the other inverter.
>>
>> I have gone through two tech support people who are not being much help.
>>
>> There are lead acid batteries here.
>>
>> Thanks!
>> -Dave
>>
>>
>> [image: Logo] <https://www.sungineersolar.com/>
>> Dave Tedeyan, P.E.
>> Owner | Sungineer Solar
>> p: he | him | his
>> a: 1653 Slaterville Rd. | Ithaca, NY 14850
>> w: www.sungineersolar.com <http://www.sungineersolar.com/>
>> c: (607) 270-0370
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