[RE-wrenches] Follow up - Nuisance Tripping Hubble GFCI on EG4

[drake.chamberlin at redwoodalliance.org]

On 2026-06-05 14:32, William Miller via RE-wrenches wrote:
> My experience has been that nuisance tripping of AFCI and GFCI devices
> can be caused by excessive THD.
> 
> William Miller
> Miller Solar.com
> 805-438-5600
> www.millersolar.com [1]
> 
> On Fri, Jun 5, 2026 at 11:25 AM Jay via RE-wrenches
> <re-wrenches at lists.re-wrenches.org> wrote:
> 
>> I’ve seen GFCI have all sorts of weird issues. Not enough data to
>> put the blame on the inverter.
>> I’d try different  big load or move the device to a different
>> outlet and see what it does.
>> 
>> Good luck
>> 
>>> On Jun 5, 2026, at 9:19 AM, Drake Chamberlin via RE-wrenches
>>> <re-wrenches at lists.re-wrenches.org> wrote:
>> 
>> 
>> 
>> I called EG4 tech support about this question. They said to use a
>> commercial grade, 20 A GFCI receptacle.
>> 
>> My question is: "isn't a 15 and 20 A GFCI electronically the same?
>> Isn't the only difference in the faceplate?"
>> 
>> Thank you,
>> 
>> Drake
>> 
>> ---
>> 
>> _Drake Chamberlin_
>> 
>> _Athens Electric LLC_
>> 
>> _Ohio Electrical Contractor’s License 44810_
>> 
>> _NABCEP Certified PV Installation Professional_
>> 
>> On 2026-06-04 11:40, Drake Chamberlin via RE-wrenches wrote:
>> 
>> A commercial grade, Hubble GFCI receptacle is nuisance tripping on
>> an EG4 XP6000 inverter. It holds fine on an LED light bulb. Under a
>> heavy load (PVC Heater), it trips after a minute or so.
>> 
>> Is there a GFCI receptacle brand that works better with the XP6000
>> inverter?
>> 
>> Thank you,
>> 
>> Drake
>> 
>> _Drake Chamberlin_
>> 
>> _Athens Electric LLC_
>> 
>> _Ohio Electrical Contractor’s License 44810_
>> 
>> _NABCEP Certified PV Installation Professional_
>> 
>> --
>> 
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The followup is that I changed the GFCI to a 20 A rated version, and it 
held the load.

Drake

Drake Chamberlin
Athens Electric LLC
Ohio Electrical Contractor’s License 44810
NABCEP Certified PV Installation Professional



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