<pre>One way to troubleshoot this is by elimination. The genset would be a start. The GFCI itself. I have had to switch from the contractor grade GFCI to a quality make in new construction.<br /><br /> Since this is new I would make sure on the AC panel, critical loads like the house pump or fire pumps and refrigerator/ freezer were <strong>not</strong> put on GFCI. I have seen some very bad things happen from this circuit that have nothing to do with ground faults. The same for AFCI or my guaranteed income source from grid-tie inverters.
Dave Angelini Offgrid Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
e-mail offgridsolar@sti.net
text 209 813 0060
On Sat, 19 Dec 2020 15:33:36 -0700, jay <jay.peltz@gmail.com> wrote:
> HI All,
>
> I have a client with a older Kohler 8-10kw generator, VFX 3648 stacked
> inverters, newer rolls batteries. its been installed and operating normally
> for 10+ years.
>
> Customer had to upgrade the house for code, which involved installing GFCI
> outlets and GFCI breakers.
>
> Since then the GFI outlets trip every time the generator starts but only
> after 3-30 minutes. They work normally on the inverters. And if you do a
> bypass/generator direct the GFI outlets don’t trip.
>
> The GFI breakers trip when the generator is about to turn off, not during
> warm down but say 30 minutes before it will turn off. So charging current
> is at the lowest. And again they all work normally on the inverters and all
> the rest of the charge cycle.
>
>
> Voltage is a bit high, around 254v-259v from the generator but it is the
> whole time and seems to stable voltage. But if the voltage was the issue
> the outlets would keep tripping. If it was too high for the breakers, why
> at the end and not the beginning?
>
> I’m thinking its possibly a control board in the generator that’s not
> working well. Can’t keep up with the PF for the inverters, etc.
>
> Buts its a new issue I’ve not run across.
>
> Any ideas?
>
> thanks
>
> jay
>
> peltz power
>
>
>
>
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