[RE-wrenches] Sol-Ark 15KW is rock steady, but crazy wild grid voltages when connected to grid

[drake.chamberlin at redwoodalliance.org]

Check for voltage fluctuation at the main lugs, right where the service 
cable comes in from the meter.

---

_Drake Chamberlin_

_Athens Electric LLC_

_Ohio Electrical Contractor's License 44810_

_NABCEP Certified PV Installation Professional_

On 2024-09-12 21:54, Kirpal Khalsa via RE-wrenches wrote:

> Scot,
> We have had numerous SolArk 15k's with loose neutrals direct from the 
> factory.   Double check all the factory connections in the accessible 
> wiring compartment.  I brought it to their attention each time I found 
> it. They said they would do better on quality control bit obviously 
> never heard back after that.
> Keep us posted what you find.
> Thanks
> 
> Kirpal Khalsa
> Oregon Solarworks
> 
> On Thu, Sep 12, 2024, 6:41 PM Blake Gleason via RE-wrenches 
> <re-wrenches at lists.re-wrenches.org> wrote:
> 
> Definitely sounds like a loose neutral on the utility side (likely at 
> the pole/tap).
> 
> I suspect if you turn off and disconnect the Sol-Ark the light 
> flickering, etc will continue (until the utility recrimps their 
> neutral...)
> 
> Blake
> 
> On Thu, Sep 12, 2024 at 5:38 PM Scot Arey via RE-wrenches 
> <re-wrenches at lists.re-wrenches.org> wrote:
> 
> I have Sol-Ark 15KW with 31kwh battery has been installed for year+.
> 
> Customer has for two days been having grid voltage issue seen as 
> dimming lights. No neighbors reporting issues. He called his 
> electrician who noted one high conductor and the other low. Have seen 
> this before unrelated to solar and it was a bad neutral. His 
> electrician says ok.
> 
> Customer disconnects from the grid because the fluctuations so severe 
> and when he does, voltage issues go away and Sol-Ark is rock steady at 
> 120-volts per leg. I send my senior tech over to ensure we don't have a 
> loose neutral or any grid conductors to the grid input. Nothing found.
> 
> Picture attached of grid voltages from the Sol-Ark monitoring (very 
> helpful, I might add.)
> 
> The electric cooperative is sending a tech out tomorrow. Any body have 
> insight or history with this?
> 
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