<div dir="auto">Hi Jay,</div><div dir="auto"><br></div><div dir="auto">Don\u2019t forget to check at the inverter. As you probably know, VFXs come with a ground-neutral bonding jumper at the AC terminals on the unit. If this issue is not happening in bypass mode or normal inverter mode without Gen input, then it could be possible that there is a bond both at generator and at AC terminals of the unit. You\u2019ve probably thought of this, but worth a check. </div><div dir="auto"><br></div><div dir="auto">Best,</div><div dir="auto"><br></div><div dir="auto">Chris </div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Dec 20, 2020 at 10:03 PM Jay <<a href="mailto:jay.peltz@gmail.com">jay.peltz@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Dave<br>
<br>
I\u2019ve already suggested that. However the house hasn\u2019t finished final sign off due to C19 and gross incompetence from the county process, so it\u2019s not possible, yet. <br>
<br>
It\u2019s entirely possible that at least part of the issue could be poor quality GFCI or good quality and overly sensitive. <br>
<br>
I\u2019ve already suggested changing a few of the GFCI to different brands to see if this will fix the issue. Even if the issue is some basic problem with generator output, harmonics etc. <br>
<br>
And possibly trying this for the breakers but they are damn expensive and again odd they trip at the end and the outlets at the beginning. <br>
<br>
I\u2019ll have to wait for the loaner generator to show up and then I\u2019ll have more data to share <br>
<br>
Thanks<br>
<br>
Jay<br>
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<br>
> On Dec 20, 2020, at 9:52 AM, Dave Angelini Offgrid Solar <<a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a>> wrote:<br>
> <br>
> \ufeff<br>
> 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 not 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.<br>
> <br>
> <br>
> Dave Angelini Offgrid Solar<br>
> "we go where powerlines don't"<br>
> <a href="http://members.sti.net/offgridsolar/" rel="noreferrer" target="_blank">http://members.sti.net/offgridsolar/</a><br>
> e-mail <a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a><br>
> text 209 813 0060<br>
> <br>
> On Sat, 19 Dec 2020 15:33:36 -0700, jay <<a href="mailto:jay.peltz@gmail.com" target="_blank">jay.peltz@gmail.com</a>> wrote:<br>
> > HI All,<br>
> > <br>
> > I have a client with a older Kohler 8-10kw generator, VFX 3648 stacked<br>
> > inverters, newer rolls batteries. its been installed and operating normally<br>
> > for 10+ years.<br>
> > <br>
> > Customer had to upgrade the house for code, which involved installing GFCI<br>
> > outlets and GFCI breakers. <br>
> > <br>
> > Since then the GFI outlets trip every time the generator starts but only<br>
> > after 3-30 minutes. They work normally on the inverters. And if you do a<br>
> > bypass/generator direct the GFI outlets don\u2019t trip.<br>
> > <br>
> > The GFI breakers trip when the generator is about to turn off, not during<br>
> > warm down but say 30 minutes before it will turn off. So charging current<br>
> > is at the lowest. And again they all work normally on the inverters and all<br>
> > the rest of the charge cycle.<br>
> > <br>
> > <br>
> > Voltage is a bit high, around 254v-259v from the generator but it is the<br>
> > whole time and seems to stable voltage. But if the voltage was the issue<br>
> > the outlets would keep tripping. If it was too high for the breakers, why<br>
> > at the end and not the beginning?<br>
> > <br>
> > I\u2019m thinking its possibly a control board in the generator that\u2019s not<br>
> > working well. Can\u2019t keep up with the PF for the inverters, etc. <br>
> > <br>
> > Buts its a new issue I\u2019ve not run across.<br>
> > <br>
> > Any ideas?<br>
> > <br>
> > thanks<br>
> > <br>
> > jay<br>
> > <br>
> > peltz power<br>
> > <br>
> > <br>
> > <br>
> > <br>
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</blockquote></div></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div>Chris Sparadeo</div><div><br></div><div><br></div><div>C_802-369-4458</div><div>H_802-728-3059</div><div></div></div></div></div></div></div>